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"Let others wage war, but thou, O happy Austria, marry; for those kingdoms which Mars gives to others, Venus gives to thee."


Well, Ryoma's opinion on this trope is quite clear... (Not pictured: when Camilla told him to kiss her)

Arranged Marriages are already guided less for love (not always, however) and more for interests coming from the families or clans involved. This trope takes it Up to Eleven: the marriage in itself will seal a peace or an alliance between either nations, smaller lands, companies, businesses, etc. All sides in this deal will reap social, political, economic, etc. benefits - though it's VERY likely that the spouses won't be too happy: either the Rebellious Princess / Rebel Prince will try to run off, The Dutiful Son will play the role with clenched teeth, the local Authority Figure (maybe The High Queen, The Evil Prince, The Wise Prince, etc.) will personally offer themself as a spouse for the sake of their lands, or The Conqueror will force a royal from a land they've adquired into this to make their conquest 100% legitimate...

This has been Truth in Television through near all eras of history, since marrying solely out of love is a relatively new idea. 

Examples of Altar Diplomacy include:

Anime and Manga


Live-Action TV


Mythology and Religion

Video Games

  • Fire Emblem:
    • In the Archanea games, Prince Hardin of Aurelis and Princess Nyna of Archanea's marriage was this. Hardin had a Bodyguard Crush on Nyna, but while she thought well of him, she mostly married him for political reasons (and still was in love with Camus)...
    • Can be done in-game in Fire Emblem Fates - more exactly, in the Revelations route. A Prince / Princess of Hoshido can perfectly marry a Prince / Princess of Nohr in this Golden Path, making the truce between both warring kingdoms potentially stronger... and it's even better if either Azura (the Fallen Princess of Valla) or an Avatar of either gender (who's crowned as King or Queen of Valla at the end), are included. The ones pictured above are Ryoma, the Crown Prince of Hoshido, and Princess Camilla of Nohr, one of the sisters of the Nohrian Crown Prince Xander. As a bonus, since both countries have more or less joined an alliance rather than fighting one another (unlike the other two paths), the supports between the candidates make such unions double as Perfectly Arranged Marriages.
    • If Petra Macneary and Hubert von Vestra from Fire Emblem: Three Houses reach an A support, their shared ending states that Emperor Edelgard told them to marry so they'd forge an strong alliance between the Adrestian Empire and Petra's homeland of Brigid. It also adds that busy as they were, they dearly loved one another and had many children.
  • This can be done in Dragon Age: Origins, specifically during the Landsmeet. Three prospect results can invoke the trope: marrying the legitimate heir Alistair (the half-brother of the late King Cailan) to the Queen Dowager Anora (Cailan's widow), having a Female Noble Warden marry Alistair, or having the Noble Male Warden marry Anora..

Web Original

Western Animation

Real Life

  • As said above, this was the NORM among nobles and rich people in older times.
  • The quote above was provided by Maximilian I of Habsburg, Holy Roman Emperor from 1508 to 1519, and logically quite the believer in the trope. He himself followed it via marrying Duchess Mary of Burgundy and then having his son Philip I of Castile (aka Philip the Handsome) marry Joanna I of Castile (aka Joanna the Mad). His descendants, the House of Habsburg, would turn this trope Up to Eleven through the centuries.
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