you have to go over by the big area of guys and save the ones in black. once you do this
you should make it through

In order to get to the trucks with the prisoners you first have to get past the patrol
that shows up just after you talk to the allied soldier you meet when you first go into
that area. Don't fire at the helicoptor. Watching for mines, run over to the rock on the
right-hand side and crouch and wait til the patrol has gone in the direction you have just
come from, which we'll call the left side of the rock, on the right-hand side of the rock
is a tank thing. Don't go to it, put away your weapons and go forward towards the vehicle
in 'front' of the rock and hide behind it, then sneak left, there should be an allied
soldier to show you to the tunnels, once there drop you sniper rifle and main heavy gun,
you should be able to keep your knife, any pistol and the grenades. Then at the tunnel
exit with the watchtower to the right-hand side, sneak left to get to the back of the
prisoner queue. Step forward and get on the truck when the enemy soldier calls you.

please respond, so you mean that i shall drop my heavy weapons and go into the tunneL?