Some people have said they had a hard time with the first part of this so hear is what I did
1. Hide behind the wall with the mounted machine gun and kill the masked soldiers as they come around the corner one by one, do this until back up arrives.
2. Now run down the path until you see a guy on you right kill him and a head there will be a few more guys. Hide behind the rock on the right and kill them.
3. Once they are dead don’t try and kill anyone up at the temple because they keep spawning, just run past them and a cut scene will start. Now you made it past without having to waste all your ammo :D.