While deployed to Vietnam, in 1967 the squadron was re-equipped with updated versions of the Iroquois, and was also reinforced with personnel from the RAN and the Royal New Zealand Air Force. Operations in South Vietnam proved hazardous, with aircrews regularly exposed to ground fire, poor flying conditions, nighttime medevacs and dangerously small jungle landing zones that were sometimes booby trapped with land mines. The unit lost seven Iroquois and two crewmen in action during its deployment. As part of the general Australian withdrawal, No. 9 Squadron departed South Vietnam on 8 December 1971. Upon its return to Australia, No. 9 Squadron was based at RAAF Base Amberley, where it continued to provide airlift to the Australian Army and search and rescue for the civilian community. Between 1982 and 1986, the squadron contributed eight aircraft and aircrew to the Australian helicopter detachment which formed part of the Multinational Force and Observers in the Sinai Peninsula of Egypt.