When you return to the bottom of the tower, Pierson lets you in on the plan. You’ll provide cover for the engineers as they move to dismantle the German’s bridge bombs. Follow Pierson up to the truck. If he has his special ability ready, now is the time to activate it.
Unload on the Germans and they begin to scramble. Use your weapon of choice to mow them down. Don’t charge blindly down the bridge; instead, use the various crates and vehicles for cover while advancing.
When you get halfway down the bridge, the Germans inadvertently unleash their explosives early, saving the bridge from getting destroyed in the process. However, the bridge has significant damage; continue following Pierson through the smoke.
Look for a plank of wood leaning against a portable generator on the left side of the bridge. Grab the sniper rifle here and pick off the soldiers on the top of the left tower. Continue down the left side of the bridge and use your scope to spot and kill the enemies on the right tower. These include a deadly sniper, machine gunner, and rocket launcher enemies.
Now turn your focus to the enemies on the bridge. They advance from the middle and left sides. Watch the Panzerschreck at the back of the truck and the enemies charging from the left side. Stay in cover and the enemies will aggressively expose themselves and attack.
When you get close to the end of the bridge, more machine gun enemies and even a flamethrower infantry appear. Just stay in cover and use a sniper rifle to attack them from range.