''Worldwar'' is an AlternateHistory continuity by Creator/HarryTurtledove about an AlienInvasion during WorldWarII.

The Race are a proud species of [[TheReptilians reptilian]] aliens with tens of thousands of years of culture, bringing an invasion fleet to the primitive world of Tosev 3 (locally called Earth) to bring it into the Empire and the light of civilization. They expect a fairly easy conquest given the locals' lack of sophistication. Their probe mission, just eight hundred local years ago--[[HumansAdvanceSwiftly certainly nowhere near enough time to advance technologically at all]]--found sword-swinging savages riding on animals. Then, to their discomfort, they discover that the planet is [[AliensStealCable emitting radio transmissions]]. Arriving late in the local year 1941, they find the primitive industrial civilization of the Tosevites confusing, implausible, and an affront to the Race's rigid doctrines. Worse, if the Tosevites have advanced that much, it throws the certainty of the conquest in doubt. However, Fleetlord Atvar decides he could go down in history as one of three leaders to conquer an alien world, or the first to turn tail and flee without even having tasted combat. They go ahead with the conquest exactly as planned.

This is a mistake.

They land squarely in the middle of WorldWarTwo, to the absolute confusion of everyone involved. Through the eyes of LoadsAndLoadsOfCharacters, of all nationalities, human and alien, we read about the humans desperately trying to survive, and the aliens desperately trying to win. The Race is forced to become more like humans, making hasty decisions and breaking protocol. It also turns out that ginger (the spice) is a powerful and highly addictive narcotic for the Race, which further strains their normal way of life. This takes up the four books of the ''Balance'' series (the original ''Worldwar'' series) and ends with a stalemate and truce between the Race and the human governments that managed to resist their invasion (the USA, [[UsefulNotes/NaziGermany the Greater German]] ''[[UsefulNotes/NaziGermany Reich]]'', the SovietUnion, the UnitedKingdom and ImperialJapan.)

Next comes ''Colonization'', a trilogy that picks up twenty years after the end of ''Worldwar''. The Race's colonization fleet arrives on Earth expecting a subdued planet, only to find that barely more than half the planet's surface is under the control of the Race. This creates intense friction between the troops of the invasion fleet, who have been significantly changed by their interaction with humans, and the much more conservative and strait-laced colonists. Even more tension comes from the [[WithFriendsLikeThese just-short-of-shots-fired]] relationships between the surviving human powers: They are united in opposition towards the Race, threatening nuclear war in defense of an almost-enemy if the Race makes any aggressive moves, but all of the major human states are hostile towards each other, and are often trying to manipulate or cast blame on each other. Making matters worse for the Race, it is discovered that on top of its narcotic effects to the Race, ginger causes females to go into estrus out of season, something undiscovered by the all-male conquest fleet. This has devastating effects on the Race's mating cycles, and introduces them to some totally alien concepts like sex for pleasure, prostitution, and monogamy.

Finally, a standalone book, ''Homeward Bound'', was added to the series. A whole bunch of humans get on a human-made starship and head towards the Race's homeworld, in an effort to negotiate a lasting peace between humans and the Race. The Race, for its part, is still contemplating the possibility of utterly destroying Earth to end the threat to the Empire, even though it would mean killing hundreds of millions of their own colonists. But in the end, they discover that it's already far too late to contain the humans, and they need to begin adapting to compete, [[spoiler: especially since ''more'' Humans show up at Home in a ''second'' starship, this one having artificial gravity and a Faster-Than-Light stardrive]].

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!!These books provides examples of:

* AbsenceMakesTheHeartGoYonder: Jens Larssen and Barbara Larssen are separated when Jens goes on an important mission to contact the US military, and both begin to feel physical attraction to others during the separation. [[spoiler: Barbara ultimately believes that Jens has died on his mission and begins a relationship with Sam Yeager, while Jens believes that Barbara is still waiting for him and so avoids having an affair.]]
* AKA47: A lot of the Race's hardware sounds like it came out of Russian armories after the collapse of the Soviet Union.
* AffablyEvil: Skorzeny spends so much time being incredibly likeable and fun to be around that most people have to continually remind themselves that he is an unrepentant Nazi. After he has gotten one of the primary characters imprisoned by the SS, many other officers - unaware that he was behind the arrest - actually use his example as motivation to break their superior out of custody.
* TheAlliance: The Axis and Ally alliances put aside their differences in order to focus on their common enemy. However, characters from all sides repeatedly say that they wish they had not been interrupted, and hope to resume their own conflicts once the present situation is resolved.
* AlternateHistory: Aliens invade during World War II.
* AlienArtsAreAppreciated:
** Some members of the Race have taken to baseball, and it is noted that the Race like Leni Riefenstahl's film-making techniques.
** After his defection, Straha (who has been considered by other members of the Race to be more like Humans than one of the Race) notes that he ''doesn't'' care for a lot of human art and music. He is somewhat fond of Bach, however.
** By the time of ''Colonization'', the next human generation (including Sam Yeager's teenage son) have grown up with the presence of the Race and think the trappings of their culture are pretty cool, shaving their heads and wearing body paint, and going semi (Or completely) nude in public. They do not say "cool", though; like the Race's biology they prefer "hot".
** ''Homeward Bound'' reveals some of the Race on Home have taken to wearing clothes and wigs.
* AlienCatnip: Ginger has a powerful and addictive narcotic effect on the Race, and once the colony ships arrive it even turns out to send their females into heat.
* AlienInvasion: The central plot point of the series.
* AlienKudzu: Once the humans and the Race find a form of peace, the Race starts importing large amounts of flora and fauna from their homeworld, causing serious ecological damage in the areas of Earth they occupy. In ''Homeward Bound'', this happens again when some mice the humans had brought to Home as food-testers are (accidentally) released and promptly multiply and go invasive. [[MoralMyopia The Race promptly throws a fit.]]
* AliensMadeThemDoIt: The Race abducts humans to test their BizarreAlienBiology and see that everyone can mate with everyone all year round. This is decidedly NOT played for comedy, and The Race is forced to face consequences later on from one woman who didn't appreciate being experimented on. Inverted in ''Colonization'', where [[AlienCatnip ginger]] puts Race females into heat out of season, causing chaos among The Race who forget everything when "mating season" starts.
* AllPsychologyIsFreudian: The series is set at a time when Freud's theories are respected and accepted, and because of its focus on sex human psychologists are stumped when trying to analyse the Race. They have no sexual thoughts outside of the mating season, so Freud doesn't apply.
* AllohistoricalAllusion:
** Being interrogated by the Japanese, Race soldier Teerts wishes that a nuclear bomb would fall upon the city. The city is Nagasaki, the second city destroyed by an atomic bomb in real-life.
** General Patton criticizes the Race for getting bogged down in street fighting at Chicago, saying that unlike the Germans the Race are slow to learn from their mistakes and the Germans would not have tried to take Stalingrad house by house if they had reached it. In reality, they did, and it was a complete disaster; Patton uses the same tactics that the USSR used to destroy the German advance.
** After being able to destroy several Race landcruisers (albeit with heavy losses) with the help of the newly developed Tiger tanks, one of Jager's men wonders if the next type of tank they'll develop will be a [[CoolTank Tiger]] mounting a long-barreled gun and sloped armor. That was precisely what [[http://en.wikipedia.org/wiki/Tiger_II the tank that succeeded the Tiger had]].
** In ''Colonization'' the Race and Nazi Germany go to war; due to the Race's ability to knock down the majority of German missiles, the Nazis are defeated and most of their major cities destroyed: Flensburg, on the Danish border, ends up as the capital. It was also the capital of Germany from 1 May to 23 May 1945 in our own timeline - Karl Donitz led the German government from there after Hitler's suicide.
** In ''Second Contact'': One member of The Race says to another, after dealing with Nazi ambassadors, that the city of Nuremberg is a trial. The Nuremberg Trials were war crime tribunals that tried the real Nazis after WWII was over.
** When Johannes Drucker comments on the suicide of the president of the United States, he thinks such a thing would never occur in the German Reich, and Hitler would sooner take up a mauser himself and fight until death. In real life, Hitler committed suicide when the Allies began closing in on Berlin.
** After President Earl Warren's suicide, several of the Race's experts on humans gather to discuss the reasons behind this act. They unofficially call this gathering the "Warren Commission". In RealLife, the Warren Commission was the unofficial name for the committee that investigated UsefulNotes/JohnFKennedy's assassination, named so after the presiding Chief Justice Earl Warren.
** As the result of being hit by the Dora cannon, a Race starship explodes. By chance, this ship holds the majority of the fleet's nuclear ordnance, The bombs do not go off, but they do spread radioactive contamination across a wide area in the Ukraine. When a joint Soviet-German mission captures some of the uranium, two of them are running close to an abandoned village. The German officer asks what the village is called; the Soviet partisan replies it is Chernobyl.
* AnyoneCanDie: Viewpoint characters die throughout the series. Characters that had an ongoing presence generally transfer their perspective to a new character that had been associated with them before their death.
* AsteroidMiners: The ''Lewis and Clark'' establishes a permanent presence in the asteroid belt, scanning asteroids and preparing for future mining and construction projects. The ''Columbus'' arrives to join her some time later. Unlike the ''Lewis and Clark'', which is built like a space station, the ''Columbus'' is purpose-built like an interplanetary craft and looks it.
* {{Badass}}: Otto Skorzeny, very much so. Basically his entire schtick is RefugeInAudacity. Once, he walks into a Race stronghold with a bag of ginger, intending to try and buy a tank's laser sight. [[spoiler:He drives out with ''an entire tank''.]]
* BadassBookworm:
** Jens Larssen manages to travel his way across war-torn America on a ''bicycle,'' fights as a competent infantryman in Patton's army and repeatedly shows himself to be tough, resourceful and determined despite the fact he is simply a nuclear physicist with no combat training. Rare case of a badass also being a ButtMonkey.
** Heinrich Jager: Skorzeny enlisted him for the raid in Split as much for his training in Archeology (The Race were based in Diocletian's Palace, and Jager finds the underground passage in) as for his military experience.
* BeardlessProtectionProgram: Moishe's escape from the ghetto.
* {{BFG}}: The ''biggest gun'' ever built in RealLife, [[http://en.wikipedia.org/wiki/Dora_(artillery) a German 80 cm K (E) railway siege gun]], makes an appearance. The Germans use it to blast a couple of Race spaceships. [[ICallItVera It is named Dora.]]
* BizarreAlienBiology: The Race mates in seasons, gets stoned off of ginger and uses far less water than humanity (with resulting "toiletry differences" - see NobodyPoops). They also have a cloaca used for west removal and reproduction. Averted with food: other than liking things saltier and needing less water, the Race can eat human foods and vice versa. Inverted from the Race's perspective: the biology of the "Big Uglies" is weird to them; that they (we) can mate all year round, are always influenced by this, and the crucial role this plays in shaping human society is deeply bizarre and pretty disgusting to them.
* BizarreAlienSenses: The Lizards can see a few colors in the infrared spectrum.
* BloodKnight: Skorzeny does not appear to care who he fights, or for what reason, just as long as he gets to fight. The child-like enthusiasm he displays, including when he is using weapons of mass destruction, before, during and after said fights [[CrossesTheLineTwice is both disturbing and more than a little funny.]]
* BreakTheHaughty: [[TheAce Flight Leader Teerts]] gets put through the wringer. Also, the entire series could count as one BreakTheHaughty moment for the Race.
* BoisterousBruiser: Otto Skorzeny of course, it is one of his chief characteristics that he enthusiastically enjoys everything he does.
* ButtMonkey:
** Jens Larssen. The guy loses his job and marriage, gets stuck behind enemy lines, gets press-ganged into fighting on the front lines on more than one occasion despite being a mere scientist, gets sent on a SnipeHunt, gets the clap, etc... Really, his only purpose in the story seems to be to have one humiliation after another piled onto him.
** Ussmak appears to be the Race's equivalent of a ButtMonkey. Butt Beffel, perhaps? He is a tank (or "landcruiser" to use the Race's terminology) driver whose first commanding officer gets killed in his very first engagement by sniper fire; his replacement commander is a [[TooDumbToLive Grade A Idiot]]; his best friend, the tank gunner, gets killed shortly later; his tank gets blown up when Skorzeny, of all people, rams a satchel charge between the turret and the chassis; when Ussmak bails out he lands in a particularly radioactive patch of mud which gets him a ''lovely'' stay in a hospital ship and to add insult to injury one of the orderlies there gets him addicted to ginger. Then he gets assigned to a new crew and gets to play cat and mouse with Wehrmacht/Waffen-SS troops and armor in France; then he takes part in the invasion of Britain where he gets introduced to a new type of warfare, ''Chemical Warfare;'' then he gets sent to Siberia, when the Race can not stand even mildly cold weather, where his second crew gets killed. Afterward, Ussmak finally snaps and leads a mutiny at his base and then defects to the Big Uglies. Unfortunately, the humans he defects to are Stalin's USSR complete with Beria's NKVD, so you can guess that doesn't exactly end well for poor Ussmak.
* ButWeUsedACondom: Generally averted, as women only seem to get pregnant when condoms are not used, and even a few times when condoms weren't used nobody got pregnant. Completely played straight with [[spoiler:Kassquit]] in ''Homeward Bound'' who uses condoms during her sexual relationship with [[spoiler:Major Coffey]]. The latter asks how to say "broken rubber" in the language of the Race. [[spoiler:Kassquit]] is initially upset to have her opinion on [[spoiler:substandard human quality control]] confirmed but decides to keep the baby.
* CallARabbitASmeerp:
** Humans tend to use the Race's names (or translations thereof) for inventions they arrived at first. Nuclear weapons are "explosive-metal bombs"; the LASER is "skelkwank", and so [=CDs=] and [=DVDs=] being called "skelkwank discs". The Race call their tanks "landcruisers" and their fighter planes "killercraft".
** A variation with animals from Home brought by the Colonization Fleet. For some, humans try to find analogues among human animals. For example, the Race's equivalent of cows look very much like dinosaurs with turreted eyes, except it's pointed out that they don't graze like cows, instead eating every blade of grass in the vicinity (making the area barren). The lizards also have two kinds of pets (also lizard-like). The befflem (plural of "beffel"), for example are friendly like dogs but are independent like cats. On the other hand, tsiongyu (plural of "tsiongi") are larger than befflem and must be kept on a leash (like dogs) but are not as playful as dogs and are a little reminiscent of cats in their interactions with their owners.
* CanadaEh: When the United Kingdom falls more and more under the sway of the Greater German ''Reich'', David Goldfarb and his family emigrate to Canada where, they hope, the immediate presence of the United States will allow the country to resist Nazi influences better than Britain.
* ChuckCunninghamSyndrome: Liu Han is a major point-of-view character in the ''Worldwar'' and ''Colonization'' series. In ''Homeward Bound'', she gets one mention by Ttomalss remembering how Liu Han had him kidnapped back during the events of ''Worldwar''. Neither Liu Han's nor her daughter Liu Mei's fate is known or remarked upon.
* ColonyDrop:
** After the ''Columbus'' arrives to join the ''Lewis and Clark'' in the Asteroid Belt, one of the tasks the astronauts perform is to strap rockets to asteroids in order to, potentially, use them to bombard territories belonging to the Race on Earth. They successfully test one of these by slamming it into Mars. Atvar is [[{{Understatement}} not pleased]].
** After [[spoiler:the ''Commodore Perry'']] arrives to Home, and the Race is confronted by GunboatDiplomacy, they warn humans that, while the Race lacks FTL drives, their ships are able to go to a fairly high (50%) percentage of the speed of light. Should Home be threatened, the Race may send ships to slam into Earth at half the speed of light (or even more, given that they wouldn't be worrying about decelerating in time and can use all fuel for acceleration), likely starting a new Ice Age. Even with FTL, it would impossible to intercept all of them.
* ConflictBall: Not once do Major Samuel Yeager or Lieutenant Colonel Glen Johnson receive official cease-and-desist orders through the proper chain of command. Their superiors instead go straight to intimidation, high-rank blustering, and ''murder'', whereas the characters themselves state that a simple explanation of "Sorry, that's classified" would have taken care of the whole thing.
* ColonelBadass: Heinrich Jager. Skorzeny's SS rank was ''Obersturmbannfuhrer'', which is the equivalent to Lieutenant Colonel.
* CompletelyDifferentTitle: The books were renamed for the Russian translation.
** ''In the Balance'' became ''Invasion Fleet'' (''Флот вторжения'').
** ''Tilting the Balance'' became ''Retaliation'' (''Ответный удар'').
** ''Upsetting the Balance'' became ''Eye for an Eye'' (''Око за око'').
** ''Striking the Balance'' became ''The Great Turning Point'' (''Великий перелом'').
** Ditto for the Italian version:
*** ''In the Balance'' - ''Invasion Year Zero'' (''Invasione anno zero'')
*** ''Tilting the Balance'' - ''Invasion Act Two'' (''Invasione atto secondo'')
*** ''Upsetting the Balance'' - ''Invasion Act Three'' (''Invasione atto terzo'')
*** ''Striking the Balance'' - ''Invasion Final Act'' (''Invasione atto finale'')
*** The ''Colonization'' series and ''Homeward Bound'' are all named ''Colonization Phase '' (''Colonizzazione fase '').
* CrazyCulturalComparison: Occurs frequently between humans and the Race, in matters both big and small:
** On the macro level, the fact that the reptilian Race have a mating season makes them see the "perpetually aroused" humans as bizarre. They also conclude that this causes competition that may be the driving force behind humanity's warlike nature and related rapid progress.
** On the micro level, there's an amusing illustration when British engineers first try to understand captured Race technology. The Race uses screws, just like we do. It's a very efficient fastener technology, so this case of parallel development isn't terribly surprising. But an arbitrary difference in standards ''does'' cause the boffins immense frustration until someone figures out the cause: Race screws are the opposite of ours.
* CrazyPrepared: The Race expected humanity would be nothing but sword-wielding primitives. They still arm their Conquest Fleet with [[TankGoodness tanks]], [[GunshipRescue attack helicopters]], [[CoolPlane fighter aircraft]], [[ThereIsNoKillLikeOverkill and]] [[NukeEm nuclear weapons]]. Lots and lots of all of them. When Shiplord Straha is asked why they bothered bringing so much hardware (including air-to-air ordnance that should have been superfluous and useless against medieval armies) to fight a bunch of primitives, Straha looks at the person asking like he's "egg-addled" (i.e. crazy) and explains that when you go to war you must prepare for war. Simple as that.
* DeadGuyJunior:
** There are two children named Heinrich in the ''Colonization'' series, both carrying on the legacy of Heinrich Jager and the example he set. That these two children are the sons of both a ''Wehrmacht'' officer and Jewish militia leader Mordechai Anielewicz speaks to the quality of the man himself.
** [[UsefulNotes/AdolfHitler Adolf]], the little brother of the German Heinrich. Although apparently he doesn't like the Nazi government because they want to take his mother for her Jewish roots.
* DeadlyGas:
** When the Race invades the British isles, mustard gas is used against the invaders. We even get a description of its effects (they are '''''not''''' very nice.)
** From time to time, the Nazis use nerve gas, the description of which is horrifying in an entirely different manner.
* DealWithTheDevil: The Jews of Poland make one with the Race, knowing that it probably is going to be bad, but they figure ''anything'' is better than the Nazis.
* {{Deconstruction}}: Of the entire alien invasion genre.
* DeliberateValuesDissonance: Taking place during the middle of the twentieth century, the social aspects of the time are present throughout the books. Racism, sexism and nationalism are much more prevalent than modern times even in the "good" nations.
* DemotedToExtra: Ludmila, one of the point-of-view characters in the ''Worldwar'' series, gets only two appearances in the first book of the ''Colonization'' series, neither of which last more than two pages and both through the eyes of Mordechai. Still, [[DroppedABridgeOnHim she gets off better than Heinrich]]. George Bagnall is actually a character of relevance in ''Colonization'', but only for one single scene when he helps David Goldfarb emigrate to Canada.
* DirtyCommunists: Part of TheAlliance, [[EnemyMine along with Nazi Germany]], and therefore the good guys.
* DistractedFromDeath: A seemingly recurring theme with Mutt Daniels. Twice he doesn't notice that somebody was killed by an artillery barrage they were ducking from until he tries to talk afterwards and gets no response. [[spoiler:Sergeant Schneider, his original superior and "finest soldier", and Miss Lucille, the medic he was trying to romance.]]
* DittoAliens: Over the course of the series, which takes place over nearly a century, neither humans or the alien Lizards ever quite get the hang of even telling each other's genders apart.
* DoesThisRemindYouOfAnything: The first book was written in 1994 and the Race's war technology seems to be based on that used by the coalition in the Gulf War.
* DoggedNiceGuy: Mutt is just a sweet old man whose fervent pursuit eventually makes Miss Lucille warm up to him. [[spoiler:Even though she's a lesbian who's never had a man. But if she had one, it would be Mutt.]]
* DroppedABridgeOnHim: Heinrich Jager died in the intermediary between the two series, supposedly from complications due to the nerve-gas he breathes during his final confrontation with Skorzeny, and this is mentioned as an aside when Mordechai is talking to Ludmila about their own lingering pains. Mutt Daniels gets an even larger bridge, with absolutely no details (although given Mutt was in his seventies, probably just simple old age) and only a single reference, when Sam Yeager discovers his obituary while thumbing through a baseball magazine.
* EarlyInstallmentWeirdness: Atvar doesn't even have a concept of impericide when Molotov tells him that the Russians killed their emperor, yet a later book has Atvar thinking that this has happened in the distant past of the Race and the perpetrator's name was expunged from history.
* EarthIsABattlefield: The invasion is world-wide. The only landmasses that are not physically landed upon by the Race are assorted islands deemed too small to merit occupation, and even these are attacked from the air.
* EasilyThwartedAlienInvasion: Subverted. On the one hand, the Race expected to confront spearmen and armored knights on horseback only to end up confronting WorldWarII-era Earth. On the the other hand, despite the reduced technological gap it still remains a hard struggle.
* TheEmpire: The Race's version of government. Before they encountered humans they thought it was the ''only'' version of government. The best word they can come up with to describe any system of government that is not a hereditary autocracy is "not-empire". The Race describe the not-empires thusly: "The not-empires fall into three categories. Those which have one man with the power of an emperor, but who is not one (Germany, Soviet Union), those which have emperors, but whose emperors have no real power (Britain, Japan) and those who engage in 'snout-counting' (USA, Canada)." They're actually so firmly entrenched in this idea that when Molotov brags to Atvar that in the Bolshevik Revolution the Emperor of Russia was murdered, Atvar shudders inwardly and marvels at the barbarism of the act, something which the Race didn't even have a concept for prior to that.
* EnemyMine: The Allies and the Axis ally together against the Race. Even the Jewish Resistance fighters, or at least some of them, work with the Nazis because they are not willing to see the entire world become occupied territory.
* EvenEvilHasStandards: Jager and the Race are both shocked and horrified at the measures taken in the name of German national security, particularly the industrialized murder of the concentration camps and Babi Yar. For the Race, the idea of killing a whole demographic is something they've never imagined.
* ExactlyWhatItSaysOnTheTin: Shiplord, Fleetlord, etc. all the way down to "Small Group Leader". Few of the Race's titles and ranks leave anything to the imagination.
* ExposedExtraterrestrials: The Race never wears clothes, except for (sometimes) anti-ballistic vests. Their idea of proper attire is to cover themselves with body paint. They are utterly unprepared for Earth's far chillier climate, and suffer greatly in their campaigns in the USSR and America during the winter months, being forced to scavenge clothing to keep from freezing.
* FaceHeelTurn: Jens Larssen starts as one of the viewpoint characters who volunteers for dangerous missions for the good of America, but slowly loses his sanity and turns against humanity after becoming the ButtMonkey.
* FantasticRacism: The Race view themselves as the apex of sapient life, exemplified by their name: They are simply '''the''' Race, anybody else is beneath them and thus deserves to be conquered and exnslaved. The humans have less condescension--since they are beneath the Race technologically--but a good deal more hate.
* FantasticSlurs: "Lizards" for the Race (or "Little Scaly Devils" in China), "Big Uglies" for the humans.
* FlatWhat: Atvar has a mental one of these while talking with the Soviet diplomat while asking him to surrender. Upon asking him how the USSR coped without an emperor, Molotov promptly replies that they murdered him, upsetting both Atvar and his interpreter. He has another when Molotov demands ''Atvar's'' surrender, while Soviet forces are being hammered by the Race.
* FreudianTrio: the three most senior members of the alien Race's conquest fleet exemplify the parts of the human psyche, in the context of a generally very conservative and cautious species-society:
** Id: Straha, third in the hierarchy, is so aggressive, radical, adaptable and short-term oriented his superior compares him to humans (not a compliment). [[spoiler: After the conquest suffers setbacks, he tries to overthrow his commander and take over the fleet. When that fails, he takes refuge with humanity, only to later regret his choice.]]
** Ego: Atvar, the fleetlord, tries to balance tradition and change, caution and initiative, and play off the other two against each other.
** Superego: Kirel, the second-in-command, is focused on not making any mistakes, and never deviating from the path laid down, almost regardless of price or consequence. His attitude is very common among the junior members of the fleet, but he represents it at the very top.
* FutureSlang: Well, Alternate [=60s=] Slang. By ''Colonization'', human teenagers who grew up with the Race being a fact of life, learn stock phrases in their language such as "I greet you" and "It shall be done" and treat them as slang. Additionally, American teens adopt the word "hot" to have the same connotation as modern-day "cool". Note that their "hot" is different from modern-day "hot" (which means "sexy").
* GameShow: In ''Homeward Bound'', the human ambassadors learn that Donald, a naturalized American Lizard, is the host of a game show called ''You'd Better Believe It''. The show is somewhat similar to Fox's ''The Chamber'', where contestants answer questions while strapped into a human gyroscope and harassed with airjets, water sprays and mild electric shocks. It also has a [[LovelyAssistant beautiful assistant]] named Rita who [[FanService goes topless]], which is a common (Race-influenced) style for women of the time.
* GayBravado: ''Skorzeny'' often flirt with Jager, who did not seem to mind and even replied accordingly.
* GenreSavvy: Sam Yeager, an avid reader of ''Astounding Science-Fiction'', becomes one of humanity's greatest experts on the Race (as well as being held in high regard by the Race itself) because he is able to think beyond the normal human perspective.
* GoThroughMe: In ''Homeward Bound'', when the new ship ''Commodore Perry'' arrives at Home, they are given explicit instructions not to allow Sam Yeager to come back to Earth. The people who came with him sign a petition saying "If he stays, so do we," which results in the ''Perry'''s crew (very) grudgingly allowing Yeager to return with them.
* GrammarNazi: Barbara Yeager becomes this by the ''Colonization'' trilogy, forcing her husband and son to use proper English in her presence since she has a background in English Literature. Naturally, neither Sam nor Jonathan bother doing this when she's not around. Sam, who was born and raised on a farm, sometimes laxes into poor grammar deliberately as a form of rebellion.
* GunboatDiplomacy: ''Homeward Bound'' features two human starships. The first is the ''Admiral Peary'' and comes on equal footing as two star-faring races seeking a lasting peace; the second is ''[[MeaningfulName Commodore Perry]]'' and comes with a [[spoiler:Faster Than Light Drive, and the willingness to (bleep) things up if the Race doesn't play nice with the humans.]]
* GunshipRescue: The Race love their helicopters, but as time goes on they become more and more vulnerable to partisan rocket fire.
* HeelRealization: This happens to Panzer Commander of the Wehrmacht Heinrich Jäger when an old Jewish man shows him the bullet hole in his neck, and tells him the story of how he got it. Heinrich had heard the rumors before then, but he hadn't believed in them. The third book sums it up nicely:
-->What Skorzeny didn't get and wouldn't get if he lived to be a hundred - not likely, considering how the SS man lived - was that ''what we were supposed to do'' and ''what our superiors ordered us to do'' weren't necessarily the same thing.\\
Soldiers didn't commonly have to make that distinction. Jäger hadn't worried about it, not until he had found out how the Germans dealt with Jews in the east. Since then, he hadn't been able to look away. He knew what sort of disaster awaited the world if the [[AlienInvasion Lizards]] won the war. Like Skorzeny, he was willing to do just about anything to keep that from happening. Unlike the SS man, he wasn't willing to believe that everything he did was fine and virtuous.\\
That made for another subtle distinction, but he clung to it.
* HideYourLesbians: Miss Lucille, despite Mutt's obvious crush, rebuffs all his advances and explains that she is not interested in any man, not just him. When Mutt asks if she is one of those "lizzies", she merely asks what his reaction would be if she was. It is never expounded upon, and she soon begins [[IfItsYouItsOkay to return Mutt's attraction]].
* HigherTechSpecies: The Race have a higher technological base than any of the other three intelligent species known to exist, with an older culture and government as well. However, they are not so far ahead as they like to think when others begin t catch up.
* HumansAdvanceSwiftly: Having sent probes and observed knights on horseback, the conquest fleet arrived 800 years later expecting basically more of the same and completely unprepared for the industrial civilization that humanity had built. The Race initially speculated that this was due to Earth having lots of oceans to mess with the pace of progress, while the Race had to plod along on land. Later on, human mating patterns are also blamed; humans are in constant competition, whereas the race mates only once a year (six months to us), thus leading to greater competition and faster advancement.
* HumansAreDivided: It's WWII, so naturally.
* HumansAreSpecial: Kind of. The other two races the Race has conquered were reptilian and similar in nature to themselves, while humans are mammalian. Logically, the Race deduced that '''all'' intelligent life is like them. There are several different theories proposed by the Race as to why we seem to be an aberration.
* HumansByAnyOtherName: The Lizards refer to humans as "Tosevites" derived from Tosev, their name for Sol. When speaking formally, anyway. In casual speech, they're just as likely to refer to humans as "Big Uglies".
* HypocriticalHumor: The Race dismisses all human religions as silly superstitions based entirely on blind faith, and yet they believe in a form of heaven where the dead are united with the spirits of Emperors past. Whenever a human points this out to a member of the Race, their response is almost universally "Yes, except you're wrong and we're right."
* IdiotBall: Johannes Drucker is blackmailed by Gorppett into helping the Race by threatening to reveal to Drucker's superiors that Drucker knew, and was friends with, notorious Jewish leader Mordechai Anielwicz. This would be a very competent threat against most Nazi officials if ''Fuhrer'' Dornberger not only already had this information, but had actually ''met'' Anielwicz via teleconference when he and Drucker were talking.
* IfItsYouItsOkay: Miss Lucille makes it quite clear that she is not interested in Mutt (Or anybody else) and [[HideYourLesbians half admits]] that she is a "lizzie." However, after Mutt keeps his [[DoggedNiceGuy dogged persistence]] Lucille admits that, with him, she is closer to giving it a try with a man than she ever has been before. [[spoiler:[[TearJerker Then she gets]] [[BuryYourGays killed by Lizard artillery]]]].
* InformedAbility: Sam Yeager is constantly mentioned to be the only human capable of thinking as the Race do, but few actual examples are provided of him doing it. Most of his "insights" are common sense and real-world techniques of communicating between people who don't speak the same language (Generally pantomime, slow repetition and emotive expressions/sounds).
* InformedAttribute: The Race keep saying that their language is very logical compared to human ones, but from the few words we see they seem to have a similar number of irregular plural forms to your average human language. The Race themselves are often described as being obedient and subservient by nature, but once the Colonization Fleet arrives it turns out they casually break laws just as often as humans, including several characters who begin tasting ginger despite the already-present (And extremely harsh) regulations against it
* InsaneTrollLogic:
** Molotov, when he meets with Hitler, is repeatedly astounded by how much of the man's thinking revolves around the "fact" that the Jews are trying to cause trouble for humanity. Particularly when his different statements and beliefs contradict one another in the same conversation.
** In the ''Colonization'' series, a member of The Race thinks this of a Nazi official she talks to about their status as the "Master Race".
* InsufficientlyAdvancedAlien: The technology of the Race is more advanced than that of humanity, but is not so far advanced as it should have been given how long they have been developing it. One human explicitly points out that if humanity had had nuclear technology for thousands of years, they would have done more with it than the Race did.
* IntelligentGerbil: The Race are described in the books as 'looking like chameleons with delusions of grandeur.'
* InterruptedCooldownHug: After a heated argument, Groves gives Jens the rest of the day off to go home and calm down. On the way home, he is approached by the base commander, who, informed of his leave, calls him a liar and a malingerer and tries to escort him back to Groves to clear things up. This is the last straw for Jens, who kills the colonel and his guard and tries to defect to the Lizards.
* IronicEcho: The first book opens with Atvar and the flagship's shiplord, Kirel, looking at an image of the enemy they expect to face, a knight on horseback from the Middle Ages and laughing at the prospect of an easy conquest. The last book in the ''Balance'' series, the first of the ''Colonisation'' series and ''Homeward Bound'' opens with them doing this again, somewhat more ruefully. Albeit also as exposition for those who started reading the later books.
* JustHereForGodzilla (InUniverse): In ''Homeward Bound'', the returned Americans find that Donald (a Lizard whom Sam and Barbara Yeager raised) hosts a game show with a LovelyAssistant who goes topless. At the end of the episode, Donald remarks "I know why you folks tune in" and shoots a knowing glance at his co-host's "assets".
* LaResistance: Portions of the first six books are dedicated to groups working in Race-occupied territory, such as the Jews in Poland or the Chinese.
* LoadsAndLoadsOfCharacters: Harry Turtledove is incredibly fond of doing this. Somewhat justified in that it's how he covers lots of different areas of the war at lots of different levels.
* MamaBear: Liu Han would like you to know that you are ''so'' not going to get away with keeping her baby away from her.
* MeaningfulName:
** America's spacecraft tend to be named for explorers; the first ship to reach the Asteroid Belt is the ''Lewis and Clark'', and the first ship to reach Home is named ''Admiral Peary''. The first FTL-capable ship is named ''Commodore Perry'', after the man who forcibly ended Japan's isolationism. The Race eventually learns the meaning behind these names and is none too pleased.
** The Race's spaceship built to defend Home against the ''Admiral Peary'' is not named for an Emperor, like all the others. Instead, it is called the ''Horned Akiss'' after a dragon-like beast from the Race's mythology.
* MildlyMilitary: Major Samuel Yeager and Lieutenant Colonel Glen Johnson never receive orders from their immediate superior to halt their investigations into the US space station, neither is ever transferred to a different post to reduce their access to information, and neither even has their security clearance revoked. What they do get is a screaming fit from Curtis [=LeMay=] who, though a three-star general, has no authority over them due to the chain of command. The one person who gives them orders ''is not authorized to give them orders.''
* MohsScaleOfScienceFictionHardness: For a story about an alien invasion it is a surprising Level 5 hardness (At least, until the ''Colonization'' series and ''Homeward Bound''). With the exception of cold sleep, all technology is either equal to or inferior to real life technology. At no point do they bend, break or even ''bounce'' the laws of physics.
* MolotovCocktail: Molotov is one of the main characters, but he never actually touches one. Sam Yeager and Liu Han have them in their sections, though.
* MotiveDecay: David Nussboym was originally a Lizard collaborator because he felt they were the best hope for Jewish survival in Poland, and because he hated the Nazis enough to override his concern that the entire would would become an outpost of the Race. Mordechai himself admits that David is an honorable and brave man, and that just because they have opposing viewpoints does not make him a greedy and self-serving fool. However, once David is sent to a Soviet ''gulag'' he becomes a collaborator solely to support himself, and betrays friends and enemies alike to the head of the camp in order to advance his own agenda. This would normally count as [[CharacterDevelopment a change in the character because of his surroundings]], but his own thoughts and memories now reflect on how he did the same things back in Poland and throughout his life, and his very nature is self-serving.
* MovingTheGoalposts: Averted by Mordechai Anielewicz. When his son Heinrich asks for a beffel (a lizard pet), Mordechai's wife Bertha does what a typical parent would do and set a difficult condition for the kid. Of course, Heinrich manages to fulfil the condition and catches a beffel. Just as Bertha is about to invoke the trope (like any parent), Mordechai countermands her and and lets Heinrich keep him, earning Bertha's ire. A few days later, the beffel saves their lives by waking up Heinrich during a fire. After that, no one thinks that the little creature should go.
* MutuallyAssuredDestruction: After the first wave of invasion, this is the status quo between the human powers and the Race. Working together, the humans could eradicate the lands controlled by the Race, but only at the cost of getting obliterated themselves, and none of the majorr human powers like the others very much. Later, in "Homeward Bound," [[spoiler: the Race turns this around on humans: yes, the humans could use their FTL warships to obliterate the the Empire before any given world knew they were under attack. But the Race's slower-than-light ships are capable of being used as relativistic kill vehicles against Earth. The mass of a Race starship impacting the planet at 50% of the speed of light would not just obliterate human civilization, it would probably wipe out virtually all life and begin a new ice age.]]
* MyCountryRightOrWrong: How some German and Russian characters, like Ludmila Gorbunova and Heinrich Jager feel. For a while, anyway.
* NatureVersusNurture: The series features aliens raising humans, and humans raising aliens, in order to see how close they can make each species to their own.
* NicknamingTheEnemy: Humans are called Big Uglies; the Race are called Lizards.
* NoBiochemicalBarriers: The Race's biology and biochemistry are similar enough that they can live on Earth and eat Earth biomatter with pretty much no problems. However, what would be slightly chilly to humans is beastly cold to them, as their home world is so hot that snow is only occasionally found at the extreme poles of the planet.
* NobodyEverComplainedBefore: Members of the Race cannot understand why humans insist on fighting back so strenuously instead of just placidly accepting their rule. Their previous two conquest experiences had nothing like the long, drawn-out resistance that humanity offers even in supposedly-placid territories.
* NobodyPoops: Averted; differences in waste volume are a source of difficulty in the Race space plumbing when humans are aboard. Also, the Race are somewhat shocked that human plumbing is so good, and love hot showers. It is also revealed that the Race have probes that can detect uric acid- a component of urine -in the air, which they use to keep track of enemy populations and movements. The humans, however, discover this technology and deliberately pee on it, leading one technician to scream that ''four billion'' humans were approaching.
* NothingPersonal: Spoken by Basil Roundbush in ''Colonization'' when David Goldfarb calls him out on using the fact that Goldfarb is a Jew and Britain's growing anti-Semitism in order to get Goldfarb to do his bidding. Roundbush keeps insisting that he personally doesn't care that Goldfarb is Jewish but finds it useful to lean on him.
* NukeEm:
** Played with. The Race tries ''not'' to use nuclear weapons in order to keep Earth as clean as possible. They do destroy several human cities, including Berlin and Washington, D.C., but their strategy is intimidation and retaliation, since they do not want to go overboard and end up wrecking the entire planet. The exchange eventually degenerates into a boxing match of sorts once human powers develop nukes of their own; for each nuke that humanity detonates, the Race nukes a city in the corresponding "not-empire". Americans, for their part, nuke a number of their ''own'' cities that are in lizard claws. The lizards eventually realize that humans would rather waste the whole planet rather than submit to the Race and sue for peace.
** Once the war between the Reich and the Race restarts in ''Colonization'', both sides use nukes heavily. The Nazis nuke most major Polish cities and their spaceships (all armed with nukes) attempt to shoot down Race ships. When Hungary attempts to make peace with the Race, the Reich punishes them by nuking Budapest. By the time the Reich sues for peace, most of it is a radioactive wasteland from lizard bombs. Despite this, in 30 years time, it's back to being a major power.
* NumberedHomeworld: The Race refer to Earth as Tosev 3 and the other worlds in their empire as Rabotev 2 and Halless 1; each planet is named after the star of its stellar system and the position of the planet. However, their homeworld is called simply Home.
* OddFriendship: Ludmila Gorbunova (Communist Russian Pilot) and Heinrich Jager (Nazi Tank Commander)
* OhCrap: During the Race's first (and only) encounter with the German [[{{BFG}} Dora cannon]], which fires 80-cm shells, they mistakenly assume by its speed and size on the radar that it's a missile and attempt to shoot it down with their own. However, the round's tough outer shell shrugs off the missiles, allowing the cannon to take out two ships before the cannon is found and destroyed.
* OneWorldOrder: Averted. While humanity at large bands together and set aside its differences to fight the Race, it quickly becomes clear that the notion gets cast aside, no one all that eager to let any particular nation, group or ideology take charge over all mankind. It's telling that even after several decades, Earth is still made of nation-states, albeit dominated by either the leading powers or the Race.
* OutsideContextProblem: None of the human participants conceived at all of an alien invasion disrupting their own conflicts.
* PassFail: When the (Jewish) Mordechai Aneliwicz is traveling in the countryside, he encounters a farmhouse and attempts to pass as a Polish partisan (A Catholic Pole). He manages to eat the ham they're serving without hesitation, but is caught out when he crosses himself wrong and does not think to put butter on his potatoes. Fortunately for him, they aren't upset about it.
* PointDefenseless: The Race has anti-missile missiles as their main protection against enemy missiles and rockets. However, they fail to do anything about the Dora rail cannon rounds, as their shells are too thick. They also aren't 100% reliable against much more primitive human rockets, which the Germans and the Americans start using. Other close-in weapon systems are mentioned, but they are stated to be ineffective against rockets and missiles and do little to protect their starships.
* RaisedByOrcs:
** Liu Han's daughter Liu Mei was Ttomalss's first attempt at this. Then Liu Han joined Mao's Communists and forced the Race to return her daughter. However, even twenty years later, Liu Mei is unable to form facial expressions, as lizards' faces don't move, and the lack of feedback to her smiles as a child meant this response is atrophied. Additionally, Liu Mei's first word was a lizard emphatic cough.
** A human baby is abducted by the Race, named Kassquit and raised by the scientist Ttomalss as one of them to see if the Tosevites can integrate into the Empire. He does not know ''what'' to do when she hits puberty, and the increasing problems of reconciling her human nature with her identity as a member of the Race causes her a lot of anguish. In an inverted example, two Race hatchlings are raised as humans by Sam Yeager, who names them [[MickeyMouse Mickey]] and [[DonaldDuck Donald]]. Though they hide it somewhat better than Kassquit, they also experience significant emotional distress at living in the wrong society.
* ReasonableAuthorityFigure: Emperor Risson, whom we finally meet in ''Homeward Bound'', is very level-headed and sensible in his dealings with the humans and with Atvar. This actually stands in stark contrast to many Race authority figures, who tend to start out LawfulStupid before long, painful education.
* RefugeInAudacity: When Skorzeny is ordered to acquire an infrared range finder from a Race tank, he actually strolls into a Lizard base with a bunch of ginger and uses it to buy ''an entire tank!'' He then proceeds to drive it off the base in broad daylight and past Lizard patrols back to his own lines.
* TheReptilians: The alien variant that the Race are. The Rabotevs and the Halessi, the two races previously conquered and assimilated by the Race, are also this, although they are different variants on the same. For example, the Rabotevs are slightly taller and less scaly than members of the Race, featuring two thumbs on each hand and eye-stalks instead of eye-turrets. The Halessi are small and are initially mistaken for LittleGreenMen, as they are more humanoid than members of the Race (i.e. more erect and with smaller snouts).
* TheRightOfASuperiorSpecies: The Race considers themselves eminently justified in conquering Earth and making humanity a subject race because of what they view as their incomparably superior culture and technology, even though said technology turns out to be not quite ''that'' advanced over humankind's.
* RockBeatsLaser: Part of the underlying theme. The Race starts out by detonating nukes in the upper atmosphere to cause electromagnetic pulses to wipe out electronics...only to find that human technology still runs on valves (a.k.a. vacuum tubes) rather than transistors, which are not affected by EMP. Later, they find out that counter-missiles are ineffective against German supergun shells, and that radar is pretty useless when it come to detecting a [[http://en.wikipedia.org/wiki/Po-2 low-flying plane made of wood and fabric.]] And so on. However, it's also averted in that any time a human machine goes up against it's Race equivalent (tank vs landcruiser, plane vs killercraft), humans lose ''badly''. The war basically comes down to "Laser beats rock, but ''lots'' of rocks will beat laser . . . and we have a lot more rocks than you will ever have lasers".
* SanitySlippage: [[spoiler: Jens Larssen]] gets pushed around one too many times, shoots a couple of soldiers and then heads out to tell the Race where the American bomb project is located. [[spoiler: He is killed when he finally goes off the deep end when he is hunted down by the cavalry, shoots a woman, hears her shriek, and leaps up, thinking it's his wife.]]
* SeductionProofMarriage: In ''Aftershocks'' Johannes Drucker has been in space by himself for over a month, and is then caught by aliens. He is presented with a female human who has been raised by them (these are aliens who don't wear clothes), and when she asks if he would mate with her if given the chance, one of the reasons he gives for not wanting to is that he is married. [[BizarreCulturalComparison Since the aliens also don't practice marriage, this doesn't really explain much to her.]]
* SelfDeprecation: In ''Aftershocks'', Monique Dutourd is thinking about a Byzantine historian at the University of Tours, and text goes "which struck even Monique as uselessly arcane". Author Harry Turtledove has a Ph.D. in Byzantine History.
* SeriousBusiness: Most of the stuff the Race does. They do not even allow actors playing the Emperor to put on the appropriate bodypaint because it would be seen as blasphemy.
* SexIsEvil: Well, not exactly evil. While the Race does find the reproductive process pleasant when they're in heat, they find the idea of ''always'' being horny abhorrent and terrifying. They do have a cultural reason for this abhorrence, since during mating season they become [[SexIsEvilAndIAmHorny so addled by horniness]] that the resulting orgy pretty much grinds their civilization to a halt for its duration. Worse for them, since the females being in heat means that not only are the females out of commission, but thanks to the pheromones they secrete, ''so is every male in the vicinity.''
* ShoutOut:
** The initial Race invasion is compared to ''Literature/TheWarOfTheWorlds'' by Sam Yeager when he and Mutt Daniels are shot out of their train in the beginning of the ''Worldwar'' series.
** A "grey-haired colored fellow" brings some US troops fried chicken in the first book, and Mutt Daniels offends him with some *ahem* ''Southern'' terms for blacks, while another kid calls him "Colonel." The black man corrects him by saying his name is Charlie Sanders.
** In the ''Colonization'' series, members of the Race refer to "[[SherlockHolmes The Red-Headed League]]" from Literature/SherlockHolmes.
** Major Samuel Yeager thinks of [[Literature/JohnCarterOfMars Thoats, Green Martians and Barsoom]] and his son speaks of {{Tarzan}}, all references to the works of Edgar Rice Burroughs.
** The captain of the ''Commodore Perry'' is named [[Series/StarTrekTheOriginalSeries Nichole Nichols]], after actress Nichelle Nichols.
** ''Homeward Bound'' contains a reference to a movie called ''[[Film/SavingPrivateRyan Rescuing Private Renfall]]'' set during the invasion with JamesDean playing the lead.
** The ''Colonization'' series features the debut of a band from England whose heads are shaved (teenagers are shaving their heads to imitate the Lizards). The call themselves '[[Music/TheBeatles The Beetles]]' partly because of their shaved heads.
** In ''Homeward Bound'', a minor character is an Inspector Second Grade named Garanpo, who is investigating ginger smuggling. He looks and acts exactly like a Lizard version of Series/{{Columbo}}.
* SleeperStarship: Both the Race and in the final novel humanity use these for interstellar travel. [[spoiler: Then humanity invents FTL and makes them obsolete.]]
* SlidingScaleOfAlternateHistoryPlausibility: Type X due to the presence of alien invaders, but after that initial setup, turns into a hard 1 or 2. Softens somewhat, becoming III or IV by the end.
* SmartBall: Once David Goldfarb decides to no longer be Roundbush's pawn in the ginger business and emigrates to Canada, he takes every possible proactive step to protect himself and his family. This includes informing the police of all threats and suspicious activity, using the research and development company he works for to develop technology to let him identify his tormentors over the phone, and making specific and detailed reports after each subsequent attempt on his life. This results in the arrest of four armed and dangerous individuals before they manage to make good on their threats, earns him and his company a large revenue stream and gratitude from the local police force, and the incarceration of the one person to actually get close enough to follow through on his threats. All from taking simple and common sense steps to protect himself using publicly and privately available resources.
* SpaceAgeStasis: The Race has been technologically stagnant for 50,000 years or so. Since they believed that every species advances at their rate, they were expecting us to still be in the Dark Ages after just a millennium of preparing for an invasion.
* TheStarscream: Straha, who is constantly maneuvering to place himself in the Fleetlord's position.
* SuddenSequelHeelSyndrome: Basil Roundbush in the ''Worldwar'' series is charming, friendly, a good sport when it comes to women and, most tellingly, an officer willing to stick up for David Goldfarb and get him an officer's commission despite Britain's emerging anti-semitism. In his ''very first scene'' in the ''Colonization'' series he blackmails Goldfarb into working for him by threatening to kill his family. Britain in general has become more and more reliant on the Greater German ''Reich'' after it lost its empire, and the nation that once fought Hitler tooth-and-nail is now entertaining formally adopting the Fascist anti-semitic policies.
* SuperweaponSurprise: When the Race get ready to invade Britain, Churchill promises to unleash a new weapon the likes of which the Race have not seen before. They think he is bluffing until mustard gas shells start landing on their invasion force. Turns out the Race never developed poison gas; they have no chemical weapons, chemical warfare doctrine or protective gear, and rapidly adapting to new situations and inventing things on the fly are ''definitely not'' two of the Race's strong points.
* SwitchingPOV: Multiple characters rotate through the chapters, usually at least one from each of the major human countries and the race itself.
* TankGoodness: The Race's main battle tank, from the in-book descriptions, seems to be a carbon copy of a Russian T-72. The only difference is that the compartments are designed for Race bodies and that the Race version is powered by hydrogen fuel cells. The human forces need to use ZergRush tactics (6-10 Panthers/Tigers per race tank, and the Americans count 10:1 as good odds) in order to triumph over the Race's more advanced weaponry. However, to paraphrase the Germans, "They (The Race) are like the Russians: their tanks are good, but their tank ''skills'' are ''scheiße.''"
* TechnologyPorn: The descriptions of the Dora supercannon, in the first novel, are a fine example of this.
* ThickerThanWater: Averted with The Race, as they cannot understand why humans put so much emphasis on familial relations. Understandable, since the Race are raised in a communal fashion, with no known mothers or fathers, and are more generally 'domesticated' rather than 'raised' as we would think of it. Thus, Race children form no real bonds with any one particular 'parent' individual as they grow up. Friendship, however, is a powerful bond in the world of the Race, since they feel that [[FamilyOfChoice the people you choose to be close to]] are much more important than the circumstances of who birthed you.
* ThoseWackyNazis: Forced by circumstance to be "the good guys" the story. Or, at least, ''allies'' of the good guys.
* ThrownOutTheAirlock: Glen Johnson nearly has this happen to him after getting aboard the new US space station using trickery. The guy in charge tells him that, if Johnson wasn't an experienced pilot, this is exactly what would happen to him. When did the US turn into Nazi Germany?
* TimeSkip: The series jumps forward twenty years between the end of the ''Worldwar'' series and the beginning of the ''Colonization'' series. Many characters have died in the interim and new people are introduced to flesh out the roster. Those characters which are returning have changed, turning from low-ranking young soldiers to experienced officers, and [[FaceHeelTurn some are no longer as pleasant as they were in their youth.]] ''Homeward Bound'' features half a dozen timeskips, starting in 1972 and eventually ending up in 2031, telling the story of how the characters who were on the ''Admiral Peary'' got there.
* UnexpectedSuccessor: Secretary of State Cordell Hull assumes the Presidency after Franklin Delano Roosevelt's death.
* UnusualUserInterface: While it's only unusual from a human point of view, the Race's controls are geared towards finger-claws rather than fingers. As such, humans need artificial finger-claws in order to operate the Race's machinery. Also, the Race's voice-activated appliances only respond to commands in their own language and have trouble with human accents (the Race have no different accents as everybody tries to speak the same way).
* VichyEarth: The Race attempt to achieve this, but only partly succeed.
* VillainBall: [[spoiler:The USA]]. They attack the colonization fleet of the Race with the goal of...actually ''there is no goal at all''. They are perfectly aware that this attack will not drive the Race from Earth, they know that this will not seriously impede the actual colonization since the fleet is so large that only a relatively minuscule number of males and females will actually be killed, and they have no plans to even place the blame on another of the Earth states in order to get their human enemies eliminated. The entire scheme, beginning, middle and end, is simply to kill a lot of members of the Race with ''no benefit to themselves''.
* WeAREStrugglingTogether: Despite the fact that they are united against a common enemy, the Axis and the Allies do not exactly like each other.
* WeHaveReserves: The humans' way of fighting the Race (Well, that and guerilla warfare tactics.) Patton even says he is prepared to lose ten of his tanks to every Lizard tank he kills because that is still a favorable loss-ratio for the Human Alliance. This works in large part because the Race only has what they brought with them, at least until they start capturing human factories and adapting them to their own technology. The Race acknowledges this, particularly in a conversation where Atvar's adjutant says that he had a mental picture of them expending their last missile to take out the last human tank, only for another one to roll over the horizon.
* WhatIsThisThingYouCallLove: The Race does not have familial bonds because they view mating as a purely practical matter; the Emperor is the only individual who even keeps track of his kids. Thus they find the notion of romantic love to be confusing and disgusting. The introduction of ginger changes all that for the Race, as members of the Race who were formerly just friends can now have sex upon desire, causing more orthodox Lizards to shun them and treat them as perverts, especially when they express a desire to get married.
* WhatMeasureIsANonHuman: Both the Race and humanity have a lack of empathy for the other, and both sides commit atrocities with the explanation that the other side is only human/Lizards. The few characters who oppose such thinking, like Sam Yeager, are condemned by their compatriots.
* WhenSheSmiles: Mordechai Anielewicz finds Bertha Fleishman more attractive when she smiles, usually considering her plain.
* WorldWarTwo
* YoungFutureFamousPeople

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