The tent camp was located on Orote Field, an abandoned airstrip on the Orote Peninsula within Naval Base Guam. At its peak it held a population of 39,331. The camp, called Camp Rainbow, was staffed by units from the U.S. 25th Infantry Division from Schofield Barracks, Hawaii; initially under the command of Lieutenant Colonel Will H. Horn (April–May), and later of Colonel Jack O'Donohue (June–September). The command consisted of the 1st Battalion, 5th Infantry Regiment and 1st Battalion, 27th Infantry Regiment, elements of the 25th Supply and Transport Battalion, a field hospital from Fort Lewis, WA the 423rd Medical Company and intelligence teams. In addition to the Army run camp at Orote Point, numerous Vietnamese were housed at Andersen Air Force Base in an area known as Tin City. This complex of pre-engineered metal buildings had previously served as housing for aircraft maintenance and other personnel supporting the B-52 bombing missions that flew from Andersen. The complex included dormitory and latrine facilities which were quickly made ready by base personnel.