A few tips on the hard parts:
- At the beginning when you shoot the grenade launcher out of the helicopter you'll want to take out the AA nests on the rooftops first. You'll also want to spray a few rounds at the rooftops as you fly by them to preemptively take out RPG soldiers. You can spread your shots out a bit as the grenades have a pretty good blast radius. It's easy to die here but keep trying and see if you can identify what killed you so you can take it out on the next flyby.
- For the approach to the friendlies, keep to the left and stay in cover. Peek out and shoot the bad guys as you move forward. Be ready to toss grenades back. Your buddies will do a good job of killing off the bad guys as you press forward.
- In the building with the friendlies, stay to the left and make use of your flashbangs. This part is pretty easy.
- The battle after you meet up with the friendlies is probably the hardest part of the level. Start out by switching to your grenade launcher, move forward and shoot the helicopter to your right (aim slightly high to hit it, the one on the left gets shot by a passing cobra so don't worry about it). Then run forward to the right and drop down. Back up and scope in at the top of the building straight in front of you and shoot the three soldiers who appear on the rooftop. Now run to your left past the gap in the fence and peek out and snipe the guys who appear in the windows of the building to the right (where you shot the guys on the roof). There should be about a half dozen so wait until you don't see any more. Be ready to throw grenades back as you'll usually have a couple tossed your way at this point. Peek out a little more and shoot some people straight ahead of the gap in the fence then sprint over to the other side (where you were when you dropped down). Snipe at the guys who appear on the platform in the far left corner until they stop reappearing. Now run out behind the cargo container so you are shielded from the building and make sure you have a full clip. Move out to the left and advance forward, watching out for people behind the container and in the building doorway. Move up to the front of the building and stay to the right of the door. Your men should move up with you. Let them take out the bad guys nearby for a bit. Move into the building but watch for a guy right around the corner (a flashbang helps here) and bad guys still alive in the courtyard to your left. As you exit the building to the right, watch out for guys in the alley to the left then head through the gap in the stone wall towards your objective. There should be a few guys to the right as you approach the helicopter.
- The next helicopter part is pretty easy. Just take out the bad guys as you fly.
- When you retrieve the crashed pilot, move quickly keeping to the left and shooting anyone you encounter. Grab the pilot and run directly back to the helicopter. I had no problems with this section and it seemed like nobody shot me as I ran back with the pilot but that might not be the case for you.