Don't move to the east. Instead, check one of the surrounding buildings - 3 on your map. You should be able to find a huge ammo stockpile inside. Rearm yourself and take a rocket launcher while you're at it. You may exit this building.
Now you should consider moving to the east, however you will have to go through two of the nearby buildings. Start off by entering the first one (screen) and then find a passageway leading to the other one. As a result, you will get closer to your current destination without risking anything.
If you've followed my instructions, you should be standing near one of the exits (screen). This is also an excellent area to take out enemy troops. Remember to kill them one at a time. You will have to move back each time you've killed someone, so you won't get spotted. Watch out for the upper balconies. Thankfully, no one should decide to come to you.
You will have to kill all visible soldiers from here. Once this is done, head on to nearby containers (screen). These objects can be found to your right. Approach a new door and activate your night vision, because it's very dark inside. You will have to kill other soldiers here. Be careful, because they may decide to leave the building. There's going to be at least 6-8 of them.
Make sure that it's safe before you decide to enter this building. Start off by securing the ground floor. Remember that you don't have to be in a lot of hurry. Instead, be very thorough, so you won't leave anyone alive. You'll also find some new weapons in the surrounding rooms. Once you've secured the ground floor, use the stairs (screen) to get to the first floor.
Just as before, you will have to check all nearby rooms in order to take out the remaining enemy units. You should also consider going to one of the balconies in order to make sure that there's no one else in the camp.
You should be able to find a second ammo stockpile in one of the rooms. You'll also come across rocket launchers there. Once you're ready, approach the computer and press the action key in order to upload necessary data. It's going to take a few seconds, so be patient. You won't have to leave this area right away.
Before you'll proceed with the next objective, there's one more problem for you to take care of. Head on to one of the balconies. Use maximum strength in order to reach the roof of this building. Activate camouflage and move towards an enemy tank (4 on the map). Destroy it with your rocket launcher. Go back to get a new weapon and exit the camp through the southern gate.