In Call of Duty: Black Ops, on the mission SOG (Vietnam), you come to a point where your orders are to push back the NVA down the hill. I've spent a lot of time slowly pushing down the hill but the enemies keep coming and on Veteran difficulty at some point I always end up dying. My squad mates pretty much stop at the first level down the hill providing no help.
I'm sure a portion of it is skill, but there must be something I'm missing to trigger my squad mates to continue on down and move the level forward and stop the enemy from spawning. Any ideas?