The Knights are so pushed in this turn that there is no access to Brawl any more. I don't care about claiming or losing territory, but when it affects what game modes you can play, that's a problem.
Why in the world is it set up like that?
You can still play Brawl. Though for some reason, the controller inputs are a bit fiddly when navigating the world map sometimes. If you're got a mouse or the like though, you can just cursor over to Brawl and play as normal.