Advancer Skrimish Cooperative Gamemode

This is new cooperative game mode, named Advancer Skirmish Cooperative. Map only for multiplayer type (there is no AI). Short briefing: there are two sides: first the USSR and second the USA, map keep up 4 players, but you may play like 2vs1 or 1vs1.
It's a role skirmish battle, where one player at team control ground forces and second one control aircrafts and support vehicles. Main idea is to destroy enemy base by first team, while second one main object is to defend their base.