No matter if the OH-13 has not been initial operational halicopter, this has truly get to be the most widely known choppen for the fifties and sixties world-wide. Oryginally utilized by the U.S. Army to evacuate through the Korean War, the Sioux ended up being later on found in various variation for reconnaissance missions. At the begin for the Vietnam War several dozen Sioux had been utilized and through the midsixties the OH-13 was deployed for training use. In Europe it absolutely was built under license in Italy and Great Britain. It had been distributed to practically all NATO Force. To-day the Sioux normally popular for civilian usage and authorities service in lots of nations.