Moved to England in April 1944 and assigned to Eighth AF. The 398th BG entered combat in May 1944, and until V-E Day operated primarily against strategic objectives in Germany, attacking targets such as factories in Berlin, warehouses in Munich, marshalling yards in Saarbrücken, shipping facilities in Kiel, oil refineries in Merseburg, and aircraft plants in Münster.
The 398th flew its last combat mission, attacking an airfield in Pilsen, Czechoslovakia, on 25 April 1945. After V-E Day the group transported liberated prisoners from Germany to France.
From Nuthampstead, the 398th Bomb Group flew 195 combat missions. Redeployed USA in May/June 1945. The aircraft left on 21–27 May 1945. The Ground unit went to Greenock on 22 June 1945 and sailed on Queen Elizabeth arriving in New York on 29 June 1945. After 30 days R & R some personnel assembled at Drew Field, Florida, where the Group was inactivated on 1 September 1945.
The 398th BG was redesignated as the 398th Operations Group and activated 1 June 1992. Reactivated in 1992 as 398th Operations Group. Assigned first to 340th Air Refueling Wing, later to 97th Air Mobility Wing as a KC-135 air refueling group. From 1 June 1992 – 31 March 1995 the 93d Air Refueling Squadron was part of the group. The 398th OG was inactivated on 31 March 1995.
^Aircraft is Lockheed/Vega B-17G-80-VE Flying Fortress serial 44-8771. This B-17 was assigned to the 398th BG on 2 March 1945. It flew 6 combat missions before being flown back to the United States on 23 May.
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