The Georgia Air National Guard origins date to 1 May 1948 with the establishment of the 128th Observation Squadron and is oldest unit of the Georgia Air National Guard. The squadron is a descendant organization of the World War I 840th Aero Squadron, established on 1 February 1918. The 840th was a non-flying Air Service support unit, formed in Texas. Deployed to England in May 1918, then serving in the rear area behind the Western Front in France as an aircraft repair squadron beginning in August. Remained in France after the November 1918 Armistice, returning to Langley Field, Virginia in March 1919 and was demobilized. The 128th Observation Squadron was one of the 29 original National Guard Observation Squadrons of the United States Army National Guard formed before World War II. The 128th Observation Squadron was ordered into active service on 15 September 1941 as part of the buildup of the Army Air Corps prior to the United States entry into World War II.