The 154th Training Squadron (154th TS) is a unit of the Arkansas Air National Guard 189th Airlift Wing. It is assigned to Little Rock Air Force Base, Arkansas and is equipped with the C-130H Hercules aircraft. The squadron is a descendant organization of the World War I 154th Aero Squadron, established on 8 December 1917. It was reformed on 24 October 1925, as the 154th Observation Squadron, and is one of the 29 original National Guard Observation Squadrons of the United States Army National Guard formed before World War II.