After Montignac is great , if U know how to finish it. I haven't yet but I'm having a ball so far.
At the start run straight a head , shoot the Sov in the distance.
Get some ammo from the corpse and then hide beneath the tree of the single American body . With the grenade launcher you can pick off the 4 Sov's coming towards U in shot.
Then reload and do some killing in the woods. There are 5 in the forest. First go to middle , there are 2 and then go back for another 2. By that time one Sov running along the edge is coming back again, so beware. Then go back to the bodies and exchange your M16 + M 203 for a M16, get the 4 LAW's and then go south along the edge of the forest. Crawl trough the nice cover of bushes to clear the open ground. Once you've reached the next forest, there are usually some other fellow soldiers running around to get killed. They attract the Sovs and hopefully some armor.
You can get the 1 BMP and 2 T72 with the 4 LAW's by amushing them from the forest.
Once I managed to kill everyone inside a tank but I could still drive it. Boy did I leave an impression on some soldiers.
Afterwards reload with some ammo from your fellow soliders, go towards the new LZ, you'll encounter a few more Sov's and then get rescued