Free State Guard Centennial by Stephen Chapis On June 29, 1921, the 104th Observation Squadron was federally recognized at the now-extinct Logan Field in the Baltimore suburb of Dundalk. This National Guard squadron was the first such post-World War I unit to be equipped with its own aircraft, which initially comprised thirteen Curtiss JN-4 Jennies. During World War II, the 104th flew anti-submarine patrols out of Atlantic City, New Jersey and later from Langley Field, Virginia. After the war, the unit reactivated at Baltimore Municipal Airport (which closed in December 1960) as the 104th Fighter Squadron (FS), fielding P-47D Thunderbolts. In 1955, the 104th transitioned into a fighter-interceptor squadron (FIS) with F-86H Sabres. Two years later the 104th relocated to an airfield then-known as Glenn L. Martin Company Airport (now Martin State Airport) in Middle River, Maryland. In 1970, the 104th replaced its Sabres with Cessna A-37 Dragonflies, which were in turn replaced with brand-new Fairchild A-10A Thunderbolt IIs in 1979. Three years after their A-10s arrived, the squadron’s military facilities became renamed Warfield Air National Guard (ANGB) base in honor of Major General (Ret) Edwin Warfield III, former Adjutant General of Maryland.