You start this mission on the Northern end of the map and you need to reach its Northern part, because this is where Mfinda Oilfield is. There are two main paths to your destination. The Western part takes you across, e.g. Bwala ya Masa village, where you can complete the secondary objective connected with extraction of the juvenile fighters (see details on one of the next pages of this walkthrough). The Eastern part does not offer attractions of this kind, but there are two enemy outposts that you need to walk around. (11 and 01).
Both of the above paths take you near the oilfield. Before you enter the facility, make sure that you have taken your position on one a hill and perform at least preliminary reconnaissance (the game will automatically mark two main targets of your mission, on the map). It is a good idea to get into the mission area by climbing onto one of the balconies, or climbing over the wall. Do not approach main entrances that are more heavily guarded (the Southern and the Eastern ones).