Geothermal Valley - Occupied Village Middle Level (Part 1)

Wait at the starting point behind the boxes until the 2 armored soldiers move away toward the small enclosure to the west.

Then go up the steps into the cabin directly opposite the window you just scrambled through.

Pick up a bottle or can and toss it into the far corner.

This should attract the single soldier standing outside. If you hide behind the desk, he'll pass directly in front of you. You can then take a headshot him with your bow or...

...sneak around behind him and press Y/F for a stealth takedown.

Loot the body and sneak back out the way you came.

There are 4 soldiers in the area by the bonfire: 3 close together and another patrolling in the background. Crouch behind the boxes where you started until one of the 3 nearest enemies heads off to the right.

Follow him, moving into the bushes to the right of the big log.

As he moves behind the stacked supplies, shielding him from the other soldiers' view, quickly move in behind him...

...and kill him with a stealth attack. If you've unlocked the Deadly Force skill, you should be able to do this without attracting unwanted attention.

Alternatively, you can lure him away from the others with distraction and kill him with a poison arrow from the cover of the bushes. (Not shown.) A regular headshot won't work because he's wearing a helmet.