Just to add to wittmann, the Russians are played with different political rules on each map (Europe/Pacific). They are still one power though, so you can send units from the Euro side to the Pac side if you want. For example if you are at war w/Japan you can send Russian ground and air units that start on the Euro map into China to help prop them up (because the Chinese are also at war w/Japan). You could even send those Russian ftrs to Burma or India (via China) once the UK Pac is at war with Japan (but just because you can doesn’t mean you should LOL)