when i get an oponents complex can i put the units i brought in that turn or do i have to wait for my next turn…?

and another question from a totally diferent subject… whats the best way to atk germany while rusia y defending and england + usa only sending more defense to rusia when i atk? and wich one is the weak spot?

and if there are any tips anyone could give me a strategy or something because am new in the game but i find it really interesting.

am new buying this game but i am wondering if planes can atk ships and if so how could that be possible wudent be way to easy to knock out the ships?

another question would be how could germany manage to take over england is it possible?