What exactly am I supposed to do in order to win mission CAM_1CA? The briefing is so uninformative! I've build a base on the plateau (2 factories, 1 generator, 1 command post) and a bunch of defensive structures (5-6). The enemy keeps sending drops, I kill them, and so on, until the timer expires and the mission fails. I even used the reveal map cheat in order to check that there aren't enemy structures or vehicles hidden somewhere - nope, there aren't. What am I supposed to do?