The helicopters I'm talking about are those being shown on FNC. They are specifically equipped for troop air assault, i.e. they get the troops in quickly. This was a tactic that was used extensively in Vietnam, nothing new, but it still works! Get lots of troops in quickly and kick butt before the enemy can react!
If the 101st Airborne is involved, they will have their own helicopters, and will have trained extensively with the troops involved.