The 931st Air Refueling Wing (AFRC) is a unit of the United States Air Force (USAF). Based at Grissom Air Reserve Base, Indiana, it falls under the Air Force Reserve Command (AFRC). Its primary mission involves aerial refueling operations, which enable continuous combat support by providing aircraft with mid-flight fuel. The wing operates KC-135R Stratotankers for these duties. Additionally, the 931 ARW also provides training and support to other USAF units as part of its responsibilities within the Air Force Reserve.