Those battles can be in different modes: Death match, capture the flag or cooperative. Build up your team and fight versus the enemies and destroy them.
One of the most interesting features of Battle Tanks is the possibility to split the screen in two areas so two players can play on the same computer even when playing online.
Choose one of the three available vehicles to battle and start firing. missiles, bombs, antitank mines, thermonuclear explosives,... a vast weaponry and armory in your hands to enter a really funny battle featuring great graphics.
Finally, if you don't want to play online, just battle versus the computer.