Once again, you will have to get back to the allied hangar. That's where the tanks have stopped (#1). Wait for the next objective to show up. CHECKPOINT 9.
This is a rather simple objective, although you will have to be careful from time to time. Before you decide to proceed any further, take a closer look at an enemy armored vehicle. Ignore it. The vehicle is going to be destroyed by one of the allied tanks (#2). :-)
You will be given a full control over the tanks in just a few seconds. There are two types of orders for you to choose from. The tanks can move to a highlighted spot. They also attack a designated target. It doesn't have to be a moving object. It would be best to use the tactical view to move them. They should proceed to the nearby street. You've been there a little while ago (#1). Now you will have to order one of the tanks to destroy an enemy unit (#2). It shouldn't be much of a problem. The other tank should take the lead, because the first one was probably damaged.
Both tanks must move forward a little. Don't worry about the destroyed tank. It won't be a problem for your units (#1). Be careful! There's an enemy with a rocket launcher at the opposite end of this street (#2)!! You will have to kill him now. Otherwise he would have killed your team or destroyed one of the tanks. There's a second terrorist on your right. Thankfully, he's not much of a threat. Nevertheless, you should kill him.
Order your tanks to move forward. They must destroy a second enemy tank that's patrolling a nearby street (#1). Keep moving forward. Don't let your tanks to leave the camp just yet. There are two sniper towers in the vicinity (#1). They are both being occupied by enemy soldiers. I guess I don't have to tell you that they must die. Watch out for the rest of the team! Make sure that no one gets hurt.