Pif35 - Hill advised onslaught

Mission 3 - Hill advised onslaught "Commander, begin operation; leave checkpoint defense to regular army, escort a humanitarian convoy past the border to the next city." Things went well until the uav got shot down, and the tank turned into molten steel. In the distance, you can see what appears to be a SAM site, hidden in a cliff, while your vehicles are taking heavy fire from pillboxes. One chopper will fly low and drop a squad, while the rangers on the bridge will defend the convoy and try to advance. Neutralize their defenses and seize that bunker. Seems like its your new forward observation post. Be quick, a convoy on a bridge makes a good target practice for artillery.