ok you see the thing is, here's is my situation in the mission.
You the player has to move to a spot on a hill and wait for 2 enemy blackhawks coming in.
Before the blackhawks come in, a couple of scout vehicles move down the road by you to see what's ahead before the helicopters, before their arrival.
But the thing is if the scout vehicles detect any enemy presence, the helicopters will not fly their original route, but they will get out at another location and board some vehicles then move to their last destination by vehicles.
So it's the players fault if they get detected by the scout vehicles.
See my situation?