I havent played this game in a few months so ill try my best to remember.
Well, to start off, you have about 10 diffrent vehicles and ships. each one has something special to it, like when your using one of the rocket launchers (w/e there called) you can shoot from long distences, etc.
The battles are pretty much like this: you start off at your base with a few vehicles or none. you buy them with money you have the begining of the battlle. you can also earn money by controling citys and stuff like that. the way you win a battle is capturing the other teams base or destroying all of there vehicles, whichever one comes first.
Thats really all i remember from the game.... hope this helped a little.