There is a mounted machine gun on a half-track overlooking the mortar camp. To find it, choose the right path and then locate the patrolling guard. Jump over the log and silently kill him using a melee attack. Approach the half-track and press the Activate button to man the gun. The sneak attack on the camp is complete. Start shooting at the guards on the right side first.
The half-track provides excellent cover from incoming machine gun fire and grenades. Mow down all the Germans in the camp using the machine gun. The Germans have a lot of brush cover, so locate their muzzle flashes to spot them, then shoot at them through the cover.
When the area is clear, press the Activate button to exit the half-track and search the camp for supplies. When you’re ready, proceed over the hill to the next area.
The Germans are in full-retreat mode through a swamp. When the mortars begin going off, stay right behind Turner as he charges through the swamp. Once the mortars start landing, focus on sprinting up the side of the hill.