The first part of this mission is very linear and you won't have to look at the map too often. You'll start in the northern part of the map and you'll have to go south to the Lamar Khaate Palace. You'll pass outpost 12, but it should not be occupied by enemies. When you reach the palace ruins, a long cutscene will start, showing you meeting Quiet. You will find out that you'll have to defend yourselves from the attacks of a mechanized unit containing infantry, APCs, tanks and a chopper (later).