->''"And we made our love on wasteland,\\
And through the barricades..."''
-->"Through The Barricades", Music/SpandauBallet

AliceAndBob are in love with each other. However, they belong (or [[StrawAffiliation are considered to belong]]) to different factions that are locked in some kind of war with each other. This may be nations or civilizations in a regular war, the factions of a civil war, FeudingFamilies, or whatever.

The lovers are likely to ''not'' be StarCrossedLovers: In some works they are, but in others they are never kept apart. Instead, the drama is about how they have to fight for their love or what a high price they have to pay for it as people shun at least one of them as being CategoryTraitor. Or simply the internal struggle of hating one lantion/faction/family/whatever while loving one member of it. Don't be surprised if some StrawLoser antagonists goes all EntitledToHaveYou.

While the love is usually sexual and monogamous, [[{{Polyamory}} polyamorous]] and [[TrueCompanions non]]-[[HeterosexualLifePartners sexual]] love may also be included as long as it's portrayed as love.

Compare EthicalSlut. If Love Across Battlelines is combined with TroubledSympatheticBigot, also compare SexIsEvilAndIAmHorny as well as LoveRedeems. If the lover is an antagonist rather than a citizen/relative/whatever of the enemy nation/family/whatever, see instead DatingCatwoman if she remain a villain and DefectingForLove if she makes a HeelFaceTurn / HighHeelFaceTurn. Note that a Love Across Battlelines plot often doesn't have this division into a good side and a villainous side - it is common that BothSidesHaveAPoint and that the protagonists view the conflict as a senseless GoodVersusGood.

----
!!Examples

[[AC:{{Anime}} and {{Manga}}]]
* A staple in the various ''Franchise/{{Gundam}}'' series, as part of its traditional LoveHurts aesop.

[[AC:ComicBooks]]
* Histrionix and Melodrama in ''{{Asterix}} and the Great Divide'', where the battle lines are literally a trench cut through the town.
* An Angel and a Demon in {{Preacher}}. At one point, the Angel is laying out the whole story in truly florid PurpleProse and Jesse interrupts: "What is this, your letter to Penthouse? You fucked her. She got pregnant. They caught you. I know this part." [[spoiler: It turns out they weren't actually in love - they were forced into it by [[GodIsEvil God Almighty]] specifically to create Genesis.]]

[[AC:{{Film}}]]
* In ''Film/{{Avatar}}'', the protagonist is a human soldier falling in love with a warrior of the tribe he's hired to defend the evil megacorporation against.
* Oboro and Gennosuke of ''Film/{{Shinobi}}'' are StarcrossedLovers from FeudingFamilies who are in the chosen 5 from each side to fight to the death.
* [[OurVampiresAreDifferent Sonja]] and [[OurWerewolvesAreDifferent Lucian]] in ''UnderworldRiseOfTheLycans''. The [[FurAgainstFang never-ending feud]] between vampires and werewolves becomes a full-out war because of their relationship.

[[AC:{{Literature}}]]
* Kat and Marco in [[HeirsOfAlexandria The Shadow of the Lion]]. Their subplot includes several {{Shout Out}}s to RomeoAndJuliet.
* Aral and Cordelia when they meet for the first time in [[Literature/VorkosiganSaga Shards of Honor]].
* [[spoiler: Gawyn and Egwene]] end up on opposite sides in [[spoiler: the schism in the White Tower]] in TheWheelOfTime.
* Susanna and Marc in [[Literature/SixteenThirtyTwo 1634: The Bavarian Crisis]]. Susanna was Catholic, and Marc a Calvinist, which was a pretty big deal during the 17th century, particularly during the UsefulNotes/ThirtyYearsWar.
* Torquato Tasso's ''Gerusalemme Liberata'' features a sub-plot involving a heathen amazon Clorinda and a christian knight Tancredi in love but on opposite sides. Eventually, they end up fighting each other (she was disguised in a full armor) and the girl is mortally wounded by Tancredi and dies.
* ''Tomorrow War'' series by Alexander Zorich began with neo-Zoroastrian colonists as a potential enemy whom Terran military with first-hand knowledge admire and envy for [[ProudWarriorRaceGuy neat, honorable and determined]] traits even while abhorring dystopian sides of their society. The protagonist SpaceCadet volunteered into [[EnemyMine joint operation]] against an alien threat, its participants were received with great hospitality and praised. He ended up in a LoveTriangle with two lady officers, then betrothed to one, then the war began and he met both, but not before realizing that with his bride and a good friend somewhere there it doesn't feel the same as blowing up ''unknown'' {{Worthy Opponent}}s.
* ''Literature/{{Succession}}'' has Rana and the Rix commando, as well Laurent and Nara who are on completely opposite sides of political spectrum and have tremendously differing views on the Emperor [[spoiler: however Laurent comes to agree with Nara.]]
* ''Literature/WarriorCats'' has this happen several times. Inter-Clan romances are banned specifically ''because'' they lead to the conflict of loyalty to Clan vs. loyalty to mate in a battle, but this doesn't stop these relationships from forming.
* In ''[[Literature/TheCenturyTrilogy Fall of Giants]]'', there are Walter von Ulrich and Lady Maud Fitzherbert, who are from Germany and Great Britain respectively. Since they are both of noble birth, their families would have no problem with their relationship - if it weren't for the fact that they happened to fall in love shortly before WorldWarOne.
* In ''[[Literature/BlackDaggerBrotherhood]] The Chosen Layla and the Leader of the Band of Bastards Xcor are in love and in opposing sides of a civil war. Layla is loyal to the legal monarchy and is expecting the child of one of the King Wrath's Elite warriors. Xcor is trying to overthrow the king. But for Layla's sake he is trying to find bloodless methods via loopholes and caveats in the old laws.

[[AC:LiveActionTV]]
* This is one of the main themes of ''Series/NorthAndSouthUS''. Pretty much everyone experience this kind of heartache as the nation is torn apart. The main storyline is of the love between the northern family Hazard and the southern family Main.
** The main protagonists George Hazard and Orry Main are HeterosexualLifePartners, forced to fight on opposing sides in the war.
** George has a little brother and Orry has a little sister (Brett, not the other one) who are engaged to each other.
** Orry's LoveInterest Madelaine is trapped in an ArrangedMarriage with an evil southerner who is in another political camp in the South's internal power struggle.
** George's wife is Catholic, making some of George's relatives consider her an enemy in the religious war between Protestantism and Catholicism.
** Finally we have Virgilia, taking the "wrong" side in the ongoing "race war", falling in love with a black man.
* In WhiteCollar Mozzie imagines that his mother and father were respectively Russian and American spies.
* In the WWII miniseries ''Island at War'' a British Channel Islander and a German airman fall secretly in love for little other reason than to evoke this trope. To make matters angstier, he might have dropped the bomb that killed her father.

[[AC:Theatre]]
* In UsefulNotes/ColdWar rock opera ''Theatre/{{Chess}}'', Florence, a Hungarian refugee whose father was captured and possibly killed by Soviet troops during the Budapest Revolution, falls in love with the Russian grandmaster who is representing the USSR in a InternationalShowdownByProxy chess match.
* ''Theatre/RomeoAndJuliet'' is probably the TropeCodifier. Romeo and Juliet, children of the violently feuding Montague and Capulet families, fall in LoveAtFirstSight when Romeo crashes a Capulet party.
* ''Theatre/WestSideStory'' is ''Romeo and Juliet'' in New York with rival street gangs. Tony and Maria fall in LoveAtFirstSight at a dance which the Jets and the Sharks hold on "neutral territory."

[[AC:VideoGames]]
* In the ''VideoGame/MitsumeteKnight'' franchise, this is one of the possible pairings, between the main male protagonist and [[spoiler: Raizze Haimer]]:
** In the DatingSim game, he's a Dolphan mercenary, she's [[spoiler: one of the Eight Generals of Valpha-Valaharian]], who will be, especially at the end of the game [[spoiler: where she'll want to avenge her fallen leader and father by the hands of the protagonist]], be torn between her duty and her love;
** In the RPG game, he's the Captain of Orcadia's Royal Knights, she's [[spoiler: a NobleFugitive from a aristocrat family of the fallen Parmet Kingdom]]; she'll try to assasinate him several times before gradually growing fond of him, [[spoiler: and later, if you're following the Licence of Heartless Odd Number route, he reveals to her he's the Crown Prince of Parmet in hiding, and just as much out for revenge against Orcadia as her: after this, they'll completely fall in love with each other.]].
* Oichi and Nagamasa in some scenarios of ''SamuraiWarriors'', since Oichi's the younger sister of OdaNobunaga.
* In ''VideoGame/TalesOfTheAbyss'', you can spend a long MatchMakerQuest getting General Aslan Frings of Malkuth together with General Jozette Cecille of Kimlasca, although they won't get properly engaged until after you stop the war. [[spoiler:[[ShaggyDogStory Too bad Frings gets killed by the plot soon afterward, whether you did the sidequest or not.]]]]

[[AC:WebComics]]
* Kieri the [[OurAngelsAreDifferent angel]] and Buwaro the [[OurDemonsAreDifferent demon]] in ''Webcomic/SlightlyDamned''.
* Aldran's parents in ''Webcomic/AntiHeroes'', also an celestial and a fiend.
* For a time in ''Webcomic/TheOrderOfTheStick'', Therkla the female orc ninja was in love with the bard Elan. He was at the time a close ally of the paladin-king Lord Hinjo, while she was TheDragon of an evil aristocrat trying to overthrow him. He had feelings for her as well, [[spoiler:although he remained devoted to Haley]].
** And tragically, [[spoiler: she was poisoned by her master for her perceived betrayal and died in Elan's arms, and refused to be resurrected if she couldn't be with him]].

[[AC:WebOriginal]]
* In ''Series/{{Noob}}'' this is the cas between Kary and Arthéon [[spoiler:for the time it lasts]], the two playing in enemy faction is a {{MMORPG}} that plenty of characters take as SeriousBusiness.