The nation that the player protagonist most often fights for in the Ace Combat game franchise. The Osean Federation is in the continent of Osea, and is made up of several member nations all situated within the continent.

Osea has gone to war with Erusea, Belka, and Yuktobania.
Average Osean Fan: The Osean Federation was justified in fighting Belka!

Belkan Chad: Belka did nothing wrong.
by Darthbuttkiss January 20, 2023
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Breanna I loooooooooooooooooooooooooove you
From osean
by Vgj October 25, 2019
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