The Marines and the CH-53 helicopters which transported them, were attacked by the Khmer Rouge with machine guns, mortars, and rocket propelled grenade launchers in what became known as the Battle of Koh Tang Island.
During the Battle of Koh Tang Island, the Marines and their CH-53 helicopters came under attack from the Khmer Rouge who used machine guns, mortars, and rocket-propelled grenades to target them.