Search the bunker for an ammo restock and a med pack. When ready, press the Activate button to open the bunker door. The trench is well defended. Your priority is a shotgun-wielding soldier gunning for your position from above the trench on the left. Kill him and then focus on the multiple soldiers inside the trench. Toss a frag grenade and finish off the job by utilizing Aim Down Sight when using the M1A1.
During the advance, a few more Germans will likely appear so slowly move forward. When the area is clear, Turner instructs you to use thermite on the 150 cal cannon in the trench. Walk up to the back of the gun to place the thermite.
Immediately after destroying the first gun, a flamethrower soldier emerges from the next bunker. Use a grenade to quickly neutralize him; the Flammenwerfer slows him down, making him unable to effectively evade the explosive.
Switch your alternate weapon from the handgun to the Flammenwerfer. Move into the bunker and cleanse it with fire. Activate the door inside to exit to another trench with another piece of large artillery.
You need to clear out this area in order to get close enough to use thermite on the artillery. Use Pierson’s special ability to highlight the enemies on the field, then go prone and begin crawling through the trench. This will keep you out of the enemies’ line of sight near the gun, allowing you to focus entirely on killing the Germans in the trench.
While crawling around, pop up and pick off any visible enemies above the hill. There are several near the gun. Once the area is clear, you will get an Objective Complete notification, meaning it’s time to move to the artillery. The artillery has a med kit and a full ammo restock. Grab both before destroying the gun with thermite.