No matter whether the OH-13 is not initial functional halicopter, it has truly end up being the most common choppen the fifties and sixties world-wide. Oryginally used by the U.S. Army to evacuate through the Korean War, the Sioux finished up being down the road present in various variation for reconnaissance missions. At the start for the Vietnam War several dozen Sioux was indeed used and through midsixties the OH-13 ended up being implemented for training use. In Europe it had been built under permit in Italy and britain. It absolutely was distributed to virtually all NATO Force. To-day the Sioux usually popular for civilian use and authorities solution in a large amount nations.