They’re fighting because it’s cool, and there’s something endearing about the way the game takes a gleaming broadsword to historical accuracy to make it as enjoyable a celebration of medieval combat possible. It makes no sense for these chronologically distinct factions to be fighting for control of the same continent, but it doesn’t really matter. If you showed a historian footage of For Honor, a game in which samurai, vikings, and knights fight each other, they’d spit their tea out and politely ask you to leave.