The UH–1 "HUEY" entered U.S. Army service in 1958 with more than 9,440 different aircraft having been procured over thirty five years. The HUEY was the first mass-produced turbine powered helicopter to enter Army service. This version, the UH–1H, was designed as a troop transport and could carry ten soldiers and a crew of three. The HUEY is widely identified with the Vietnam war and remains in Army and National Guard service to date. The HUEY has been a true "work horse" of modern Army Aviation.