In 1951, the Sikorsky HO3S-1 "Dragonfly" (a Navy/Marine version of the H-5) served as a critical combat rescue and utility helicopter during the Korean War, notably used for rescuing downed pilots behind enemy lines and evacuating wounded personnel. Often operating from ships, they performed daring rescues and, by April 1951, were heavily involved in operations, including at Wonsan harbor. Key 1951 Highlights for the HO3S-1: Korean War Operations: Marine HO3S-1s from VMO-6 and Navy units were cr