Tom Clancy's Ghost Recon Advanced Warfighter 2/Recon in Force

Take over the Entrance
You need to reach the entrance of the quarry to allow the Mule to be deployed.

On the route to the entrance, here are a few buildings containing a few guards.

Wait for Allies
Allied forces will arrive via helicopter.

Clear the quarry
Clear out all enemy guards and equipment in the area.

The southernmost position is located near a water tower. Within this camp, enemies will hide in buildings but leave once they are ready to fight.

In the main quarry, there are three guard stations of note. Two are in the corner next to the artillery, and the third is composed of two soldiers with RPGs.

Head to extraction
The helicopter will land in the middle of the quarry once the most critical resistance has been eliminated.

Take out artilleries
Two artillery pieces are in the corners of the quarry. They are accessible by a single ramp leading up to the corner, and are guarded by a few enemies.

Once you clear out the critical targets, you can head to the extraction point.