In my current game, Napoleon attacked Frederick rather early on and after some back and forth, they had taken one city each and then signed peace. A couple of years later, Frederick wanted my protection and offered to become my vassal (not quite sure why - I didn't really have any military strength to talk about). Now, if Napoleon decides to attack us - which I suppose will happen sooner or later - will he go for me as the boss or for Frederick whom he likes decidedly less (Nappy is pleased with me and annoyed with Freddie)? Most of Nappy's borders are with Germany, but we share borders as well.