[[http://www.fanfiction.net/s/5904185/1/ Emperor]] is a ''Literature/HarryPotter'' FanFic written by Panamanian Creator/MarquisBlack, also author of [[FanFic/TheDarkWars The Dark Wars]]. The best way to describe it is as a ''Harry Potter'' AlternateUniverse within an AlternateHistory, producing an interesting recursive reality.

After a brief prologue set in the future, the narrative begins in October 31st 1981. As in the books, the Potters are attacked by Voldemort, but neither Lily nor James are killed: instead, it is the Potters who kill Voldemort, who disappears. Rather than remaining in England, where Dumbledore will try to use them for propaganda, the Potters run away to the continent, hiding among the Muggle community despite the fact that the economic and political situation is less than stable (due to the non-existence of an European Community to make the nations collaborate).

As Harry grows and slowly realises what his parents have gone through, he makes an oath to do anything in his hands to change the world, so that people like his parents won't have to hide away. He returns to England under a fake name at age eleven, and eventually joins the army, where he will slowly begin planning to make sure he will be able to fulfill his oath.

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!Tropes found in Emperor:

* [[spoiler: AIIsACrapshoot: Averted so far with the ATHENA Project, although it is something mentioned several times.]]
* AlternateHistory: not only in the ''Literature/HarryPotter'' universe, but in the real world, as well: the European Steel and Coal Community, the forefather of the European Union, was never formed, and the European nations pretty much remained unable to cooperate with each other, rattling sables every few years over one thing or another.
* AntiHero:
** Type II: Harry.
** Type V: Albert Hughes, who is almost a straight-up VillainProtagonist.
* AwesomeMomentOfCrowning: [[spoiler: when Harry is finally crowned as King Henry I of the Northern Sun.]]
* BadassSpaniard: Spanish general Alejandro Ruiz-Pérez is considered by the British a WorthyOpponent, fighting with great zeal and ability against them during the Anglo-Spanish War. And then ''with'' them during [[spoiler:the invasion of France]].
* {{BFG}}: Project MJOLNIR, [[spoiler:Magnetically-Accelerated Cannons built with runic magic amplifications, and able to ''vaporize'' a ship with one shot.]]
* BigDamnHeroes: Task Force GUARDIAN is against the ropes after [[spoiler: saving Queen Elicia]], and is down to a few ammo magazines and some C4 (which they plan to use to wipe out any technology they have on themselves), so they say goodbye to their command while they prepare for a LastStand. Right then, [[YourTerroristsAreOurFreedomFighters Redemption]] comes guns blazing, defeating the [=DGSE=] troops that have been attacking GUARDIAN and saving their asses.
* BritsWithBattleships: the British Army, Royal Navy and Royal Air Force play important roles in the story, but especially the first, as Harry joins it to achieve his goals.
* BrokenPedestal: The new prologue reveals that at some point in the future, Harry's daughter will resent him for his conquests.
* CrazyAwesome: many things. Especially, when Oliver Wood (an officer in the Northern Sun's Army) [[{{Teleportation}} Apparates]] to some point in the sky to check on enemy positions and then stops his descent using magic.
* FaceDeathWithDignity: [[spoiler:the King of the United Kingdom, last surviving member of TheHouseOfWindsor after the Death Eaters kill the rest of his family and leave him paraplegic, does this. It is mentioned that he dies "with a peaceful smile on his face".]]
* FalseFlagOperation: the Northern Sun carries this out with Operation [=SUCKERPUNCH=], [[spoiler: dropping magical bombs in France and many other parts of the world to provoke massive technological failure and blaming it on the Death Eaters, to then reveal they have hardened technology able to resist this, goading France to declare war]].
* FamousLastWords: "Ancestors... have I made you proud?" [[spoiler:said by the last King of Britain as he dies.]]
* ForWantOfANail: Robert Schuman's inability to convince the French government to collaborate with the Germans, nipping the European Steel and Coal Community in the bud, causes many conflicts fifty years down the line.
** [[spoiler:Later in the story, the King of Great Britain reveals to Harry and a few others the existence of Project Trinity, the attempt to create a nuclear bomb. In this story, the Project failed to make one, so the Allies were forced to carry out Operation Downfall, with the expected (that is, horribly high) number of casualties.]]
* ForegoneConclusion: the prologue pretty much but states that Harry will succeed in his quest. [[spoiler:It is implied that Elicia dies a few years before the ending, after an adult Katherine (Harry's daughter) argues with Harry.]]
* FourStarBadass: Harry becomes this eventually.
* HeWhoFightsMonsters: Ginny, who was a normal Auror, becomes ruthless and cunning after meeting Harry, who she tried to arrest for nearly breaking TheMasquerade.
** Albert Hughes.
* KlingonPromotion: During the Siege of Sagunto, Harry organises the death of two generals above him in the ranks to take control of the British Army in the region.
* {{Irony}}: when British Aurors led by Ginny Weasley try to arrest Harry for using his magic on the war with Spain, nearly breaking the [[TheMasquerade Statute of Secrecy]], they choose to do it while he is being decorated with the Victoria Cross. This leads to the Statute of Secrecy being really broken after the journalists record the magical fight between Harry and the Aurors. [[NeverMyFault Of course, the Aurors and the Magical World still blame Harry.]]
* JackBauerInterrogationTechnique: the Northern Sun's secret police uses this, combined with magical methods, to extract information out of terrorists and enemies.
* LackOfEmpathy: interestingly, it is not Harry, but William who suffers this.
* MagiTek: what several scientists led by Elicia manage to do. [[spoiler:Among them, genetical grafting, weapons that can vaporize their objective with one shot and working ArtificialIntelligence.]]
* MugglesDoItBetter: Elicia manages to use Floo powder to create an almost neverending power source that is not affected by magic.
* OhCrap: when the magical government remnant's representatives (Nicholas Flamel, Ginny and Ron Weasley, Hermione Granger) to Liverpool (the Northern Sun's capital) discover that the advances by Northern Sun scientists have all but rendered the main weakness technology has (it overcharges electronics, blowing up any source) useless.
* OperationBlank: two of them stand out in chapters 23 to 25. Operation SUCKERPUNCH, [[spoiler: using special magical bombs that can short-out any unprotected electrical and electronical apparatus in a great radius in many places in the world, aiming to goad France into declaring war]], Operation VANGUARD, [[spoiler:using a modified Floo Network to transport more than 10,000 troops from the Kingdom of the Northern Sun to Belgium in a few moments]] and Operation SUNRISE [[spoiler:the invasion of France]].
** Also the Projects: ATHENA [[spoiler:creation of functioning AI based on the magic of Magical Portraits]], MJOLNIR [[spoiler:creation of Magnetically-Accelerated Cannons able to vaporize their target with one shot]], HAVOC [[spoiler:genetical engineering to improve the entire Armed Forces at a genetical and biological level]] and VANGUARD [[spoiler:development of a Mass Floo transport system to take more than 10,000 troops across the English Channel in a few moments]].
* PersonOfMassDestruction: Harry becomes able to destroy buildings with Fiendfyre, which he conjures with just a finger snap. Eventually, several wizards and witches trained by Harry (among them Neville Longbottom) become able to do the same.
* RoyalsWhoActuallyDoSomething: [[spoiler:Elicia, Harry's wife, becomes one of the main scientists in the Kingdom of the Northern Sun's projects to develop new technology.]]
** [[spoiler:Harry actually strives to be this, and feels bad because, after becoming the King, he cannot be on the field and lead his troops.]]
* UsefulNotes/TheFrancoRegime: ends 10 years before RL after Franco is assassinated and British and American troops assist in the rapid democratization of the country. This, however, creates an ultranationalist backlash that leads to the election of such a government in the 2000s.
* TheThirtySixStratagems: Harry or his allies make use of many of them, as do their enemies. Harry even directly references the story behind #31 (''Wang Yun presents his daughter to court; infatuated Lu Bu slays Dong Zhuo for the Great Han''), and Chapter 15, called "The 36 Stratagems", has a mention to #2 (''Besiege Wei to rescue Zhao'').
* UsefulNotes/TheTroubles: the heavier militarization of the United Kingdom means that these hardly affect the British position in Northern Ireland, although it eventually becomes little more than a military state.
* UnitedEurope: averted. The background mentions that there are no supranational institutions in Europe such as the European Union (see AlternateHistory, ForWantOfANail). [[spoiler:Harry plans to change that, and helps establish the Northern-dominated European Treaty Organization.]]
* UnitedKingdom: due to the changes in the timeline, it becomes more militarized than in RealLife. [[spoiler:It ends up blowing up when Death Eaters attack several government installations, including Parliament and the Ministry of Defense, and kill most of the Royal Family, and dies with the last member of TheHouseOfWindsor.]]
* VillainProtagonist: Albert Hughes.
--> ''Hughes shivered as he relished Clarkson's screams from outside the interrogation room. After the man's arrest, he'd been brought back to the "Tartarus" Black Site in the middle of London, where a crew of rather vengeful interrogators had quite joyfully taken him off the military's hands. Hughes was proud to say the man had felt no relief since then. The realization made him pause for a second. Maybe he was as psychotic as people seemed to think. And just as fast, he shrugged unconcernedly. So what? He was loyal, he did his job, and his goals remained within reach. As far as he was concerned, he had it pretty good. A few psychological disorders were a measly price to pay for that.''
* WarIsHell: the effects of war on every level of society is shown. When Harry joins the battlefield, his use of Fiendfyre makes it even more similar to hell.
* YourTerroristsAreOurFreedomFighters: French group Redemption was formed to attempt to protect all wizards and witches and magical creatures in France from their anti-magical government, but they also resort to bombings in order to find more support for them.