The Gulag - Combat in the Prison Yard (Part 2)

From inside the guard tower you can take out the welder on the Command Center roof with another headshot.

If you spot a third man below on the right, wait for him to move away (orange arrow) before killing the other two.

If you've unlocked the Double Shot Skill, target one of the men, zoom in, and hold RT/Left Mouse to charge your shot. When you see the red diamond icon, move the right stick or mouse to target the second man. Then release RT/Left Mouse to shoot both of them.

If you don't have the Double Shot skill yet, shoot an arrow into the ground below the tower on the right to draw one man away from the other. Headshot him, then his companion.

Now deal with the soldier patrolling to the right of the Command Center.

There are 2 more men gabbing around a fire in the open area in front of the Command Center.

You can easily kill them both with one poison arrow. If you don't have any, use an arrow for distraction or climb back down the ladder and throw a bottle to lure one of the men away. Kill him with a headshot, then take care of the other.

If you're still up in the tower, use the rope line to climb across to the Command Center roof.

Loot the welder's body and peek through the skylight at the last enemy in the room below. Then drop down behind the building. Or, if you're already on the ground, just move quietly around to the back door.

Sneak into the Command Center and finish off the last man with a stealth takedown.