The B-29 Superfortress was primarily used in the Pacific theater during World War II. After World War II, B-29s were adapted for several functions, including in-flight refueling, anti-submarine patrol, weather reconnaissance and rescue duty. The B-29 saw military service in Korea between 1950 and 1953, battling new adversaries: jet fighters and electronic weapons. The last B-29 Superfortress in squadron use retired from service in September 1960.