Call of Duty WW2 - Infiltrated Trophy / Achievement Guide - Reach the sniper perch without being detected in Ambush. [Bronze]

Mission 10: Ambush
Objective: Infiltrate the Air Base

In mission 10 there is a sneaking section early in the mission (after attacking the truck convoy). You are armed with a silenced pistol and must infiltrate an air base.
Stick to the far right side of the base. Kill the enemies along the way with a headshot or 2-3 bullets to the upper body. There is one room with 3 enemies and the base commander. You can simply shoot them very quickly. It's okay if single enemies see you as long as you kill them quickly afterwards. They just aren't allowed to alert the entire base. If the icon above their head turns red you still have a second to kill them.
If in doubt, restart the checkpoint. You can restart checkpoints when detected and still earn the trophy in the end. The trophy pops after climbing the ladder to the sniper nest.