Two armies vie for control of the 2D world. In your fighter plane or tank, move around and use bombs and lasers to take out the enemy forces while giving your own forces a chance to move forward and eventually overcome the enemy side.
The goal of the game is to make it possible for your forces to get to the other side of the map and take over your opponent's base. You move around the map in your fighter or tank dropping bombs at the ground forces, lobbing mortars or shooting lasers at the other enemy units, cutting a path for your ground forces to advance across the screen and take the map.
A style of play where a map is generated or used (like the US) and players must conquer sections until they vanquish every territory or take a key territory. Think Risk-style play.