The world is at war so you have co choice, but to go to war or die without even trying. That is what should be during a war. Fortunately, you got your hummer and that is has a rocket launcher. Now, you need to destroy the enemy base and get back to camp.
Drive your hummer as fast as you can to the enemy base. You only got two ammos so you need to get as much ammunition along the way. Aside from ammos, you can also gather some money along the way. When you reach your destination, your job is not yet over as you need to destroy the enemy camp.