The Bell Iroquois UH-1, commonly called the Huey, was the workhorse of the Vietnam War for all American service branches and the Vietnamese Army. The helicopter here is a 1968 UH-1, serial number 68-16609, marked as Hueys assigned to the 1st Air Cavalry Division's 229th Helicopter Battalion. On March 26, 1971, at Bein Hoa, Vietnam, a stand down ceremony ended the 1st Air Cavalry's 66 months of continuous combat there, and on May 5, 1971, the division, minus the 3rd Brigade, moved from Viet Nam to Fort Hood, Texas, where it had been organized more than 55 years earlier. The records of this Huey were redacted from 1968 until 1972; after 1972 it was transferred from Fort Hood to Fort Hood Richardson, Alaska, then moved in 1986 to Corpus Christi Army Depot, Texas, assigned in 1987 to the American Embassy in San Salvador, returned in 1990 to Corpus Christi Army Depot for overhaul, then went to Jefferson, Missouri, where it remained until retirement in 1994. In Vietnam, the Huey was crude but adaptable and enduring: it could carry rockets as a gunship, casualties as an air ambulance, and supplies and reinforcements while removing the injured and dead from battlefields. The helicopter evolved from the HU-1 Iroquois, whose nickname came from its designation and remained after the Department of Defense changed the designation to UH-1. Its strong and reliable turbine engine gave it a reputation for dependability and made it well suited to a new, mobile style of warfare. Every branch of the U.S. military soon flew it, as did the air forces of South Vietnam, Australia, and Cambodia. The cost was high: the Army lost 2,249 helicopters to hostile fire and 2,075 to accidents, while the Marines lost 424 to all causes; between 1966 and 1971, one Army helicopter was lost for every 7.9 sorties, and 564 pilots, 1,155 crewmen, and 682 passengers were killed in accidents alone. More Hueys were downed in Vietnam than any other type of aircraft. Over the course of the war, more than 7,000 Hueys were deployed and flew over 7.5 million flight hours, more than 3,000 were lost in combat operations, more than 2,700 pilots, crew, and passengers were lost, and Hueys evacuated more than 90,000 patients from the battlefield, greatly increasing wounded soldiers' chances of survival. The 229th Assault Helicopter Battalion's insignia featured a lightning bolt for swiftness, association with the 1st Cavalry Division, a silver sword for combat, and the motto "Winged Assault."