This could just be a figment of our imaginations, but the enemy soldiers seem even more aggressive here than usual. This is where you'll start running into Chinese resistance almost exclusively, so open up on these foes going forward. Running through the initial trench is only going to take mere seconds, so when you emerge, simply run across the artificial boundary on your right (the blue forcefield) and reenter a new trench shortly thereafter. You're going to run into both friendly faces and enemies that need to be killed as soon as you enter the trenches, so naturally, hold your fire on the former and let it fly on the latter. Leave Field HQ and instead of going right (towards the listening station) or left (towards the tank depot), you're now gonna head straight forward, down the middle, towards a series of trenches. Because there are already so many soldiers at the Pulse Fields, it's only going to be you two as a team going forward. Leave the tent you begin the mission in and, as usual, seek out Sgt. This mission is the namesake of the DLC pack, and is the final of four missions you'll play through in this trip through a rather disturbing virtual reality.