In this mission you must intercept and destroy a rebel convoy, as well as taking out some ADAT's before you can extract. It is fairly easy and can be completed alone if you cannot find people to team up with.
Objective - Destroy ADAT's: There are three of these spread across the map that you must destroy. From the start, head south toward the road and take out the rebels stationed near the first ADAT. Have a grenadier take out the ADAT or throw grenades at it. Across the road from this ADAT is a small house with an ammo crate next to it. Kneeling behind the ammo crate, you can take out the ADAT that is stationed at your extraction point (far south corner of the map). The third ADAT you will most likely destroy after you hit the convoy (located at the southwestern farm).
Objective - Intercept and Destroy Convoy: At the small house with the ammo crate, you have a perfect position to ambush the convoy as it comes over the hill in the road toward you. Blow up the first vehicle and you will halt the convoy and it should be easy pickings.
Secondary Objective - Clear Out the Two Camps: These are the two large farms that are on opposite sides of the road the convoy came in on. Be wary of rebels inside the large buildings or small garages / barns. Take out all the enemies and head to the extraction zone when you are finished.