When the Korean War began in June 1950, the United States Air Force's Air Rescue Service was a fledgling organization possessing a variety of aircraft types, most having seen service during World War II. The concept of using helicopters and amphibious fixed-wing aircraft to rescue airmen downed behind enemy lines or in hostile waters had gained little consideration by the Air Force and was largely unproven. But by the fall of 1950 the 3d Air Rescue Squadron had begun to write a new chapter in the history of air power, and by July 1953, when the armistice was signed in Korea, air rescue had become established as an integral part of U.S. fighting forces. Although the H-5 and H-19 helicopters and SA-16 amphibians gained attention worldwide by virtue of countless daring rescues performed throughout the war, lesser known aircraft such as the L-5, SC-47, SB-17, and SB-29 also played important roles in building the U.S. Air Force's overall air rescue capability in the Korean War theater.