Bombardment Squadron: 23 June 1942 – 4 December 1945; 9 July 1947 – 27 June 1949; 1 December 1952 – 15 September 1960 (Not operational 16 May – 15 September 1960); 1 February 1963 – 30 September 1989 (Not operational 11 February – 1 July 1965; 1 December 1965 – 21 March 1966 and 3 June 1972 – 25 October 1973). 442d Bombardment Squadron: 23 June 1942 – 4 December 1945; 9 July 1947 – 27 June 1949; 1 December 1952 – 15 September 1960 (Not operational 1–15 September 1960) 443d Bombardment Squadron: 23 June 1942 – 4 December 1945; 9 July 1947 – 27 June 1949; 1 December 1952 – 15 September 1960 (Not operational 1–15 September 1960) 444th Bombardment Squadron: 23 June 1942 – 4 December 1945; 9 July 1947 – 27 June 1949; 1 January 1959 – 15 September 1960 (Not operational 1 July – 15 September 1960) 320th Refueling Squadron: 1 December 1952 – 16 June 1960 904th Air Refueling Squadron: 1 February 1963 – 30 September 1989 Support Squadrons 49th Munitions Maintenance Squadron: 1 February 1963 – 1 October 1972 320th Airborne Missile Maintenance Squadron: 1 February 1963 – 30 September 1975 320th Armament & Electronics Maintenance Squadron (later 320th Avionics Maintenance Squadron): 1 December 1952 – 16 June 1960, 1 February 1963 – 30 September 1989 320th Expeditionary Communications Squadron: c. 1 December 1998 – 1 December 2001 320th Expeditionary Civil Engineer Squadron: c. 1 December 1998 – c. 1 December 2001 320th Expeditionary Logistics Squadron: c. 1 December 1998 – c. 1 December 2001 320th Expeditionary Services Squadron: c. 1 December 1998 – c. 1 December 2001 320th Field Maintenance Squadron (later 320th Expeditionary Maintenance Squadron): 1 December 1952 – 16 June 1960, 1 February 1963 – 30 September 1989, c. 18 October 2001 – c. 1 December 2001 320th Munitions Maintenance Squadron: 1 October 1972 – 30 September 1989 320th Periodic Maintenance Squadron (later 320th Organizational Maintenance Squadron): 1 December 1952 – 16 June 1960, 1 February 1963 – 30 September 1989 320th Combat Defense Squadron (later 320th Security Police Squadron, 320th Expeditionary Security Forces Squadron): 1 February 1963 – 30 September 1989, c. 1 December 1998 – c. 1 December 2001 Major aircraft types operated Martin B-26 Marauder (1942–1945) Boeing B-29 Superfortress (1952–1953) Boeing B-47 Stratojet (1953–1960) Boeing B-52F Stratofortress (1963–1968) Boeing B-52G Stratofortress (1968–1989) Boeing KC-135 Stratotanker (1963–1989) Lockheed C-130