Shantytown - Ambush at Helicopter Hill - Part 2

As you come around the corner, a single enemy will run out from behind the helicopter. Shoot him and then move back behind the cover of the hill.

Draw your bow, with flame arrows equipped, and carefully inch out from behind the hill. From here, you can shoot the enemies as they line up behind the chain-link fence to the right of the helicopter. You probably won't run out of arrows if you started with a full supply, but you can also use the pistol or SMG.

NOTE: This is also good spot to work on the Gunslinger and Sharpshooter acheivements/trophies (kill 35 enemies with the pistol and perform 50 headshot kills in single player, respectively). You'll probably get the bow, shotgun, and rifle kill achievements later on without even trying, but the pistol tends to get less use once you've found the other weapons. If you're patient, you can use the pistol to get headshots on almost all these enemies through the fence.

When the enemies behind the fence start shooting back, just move back around the corner and take cover. If they start throwing Molotov cocktails, scramble down the hill and wait for the flames to subside. Then inch back out and start shooting again. I playtested this several times and no enemies ever approached Lara from behind.

When the men stop coming up to the fence, you may need to run up there to get their attention, but you can then run back down the hill to take cover. If there's a long lull in the action and you didn't already do so, go back for the arrows leaning against the metal crate and pick up the rifle/SMG ammo (circled in the screenshot below).

There's also an effigy (1/5) set up on a pole beside the path.

Shoot it with a fire arrow to set it ablaze.

Then, when the cloth has burned away, use a rope arrow to pull it down. This unlocks the Laid to Rest Challenge: find and destroy 5 of these effigies for bonus XP.

When you kill the last enemy in this horde, the game will autosave and you'll see an on-screen notification about switching arrow types. This is the all-clear signal.

Return up the path, go through the helicopter...

... and drop down on the other side near the Helicopter Hill Base Camp. Loot whatever bodies you can find. Then use the camp to spend your Skill and salvage points.