Connect the Dots
Once in control, support the ground forces by providing covering fire as well as eliminating the RPGs as well. You have unlimited ammo but your machine gun overheats so don't be so hard on the trigger. Aim for the explosive barrels to take out multiple enemies at once. As you make your pass, enemy technicals will also appear; just keep shooting at them to destroy them.
Off to the mountains
After the sequence, you'll have to continue on foot. Move from cover to cover as you proceed. Be careful as well since there are armored terrorists here who are more resilient against gun fire. Continue clearing the village until you get the prompt to breach a door.
Head outside then clear more enemies. The area's packed with hostiles so just dig in and defend the area until the allied airstrike arrives. Once things quieted down, follow Voodoo inside the building then clear the area outside. Continue forth until you find the underground entrance leading to the training facility.
Continue inside and use the covers as you clear the area. In the wide training room, destroy all targets to get a trophy.
After reaching the part where you took cover from a grenade blast, take out the guys in front of you then continue upstairs. You should have a better view of the enemies on the ground. After taking them out, breach the next door and follow Voodoo.
Head outside the facility then explore the cave system. Clear the tangos with a well-placed grenade then shoot the generator. After equipping your night-vision gear, proceed deeper in the cave and take out the enemies without too much resistance. Stack up on the next door and proceed to the next area.
Lights will light up, making your darkness cover useless. After taking off your NODS, take cover and continue taking out more enemies. Make your way to the train station and carefully push your way through more heavily armed terrorists until you reach the blue door at the end. Breach it to complete the mission.