Constituted 515th Bombardment Squadron (Heavy) on 19 Oct 1942. Activated on 31 Oct 1942. Inactivated on 24 Jun 1945. Redesignated 515th Bombardment Squadron (Medium) on 20 Aug 1958. Activated on 1 Dec 1958. Discontinued, and inactivated on 1 Jan 1962.

Assignments. 376th Bombardment Group, 31 Oct 1942-24 Jun 1945. 376th Bombardment Wing, 1 Dec 1958-1 Jan 1962.

Stations. Lydda, Palestine, 31 Oct 1942; Abu Sueir, Egypt, 8 Nov 1942; Gambut, Libya, 6 Feb 1943; Soluch, Libya, 27 Feb 1943, Bengasi, Libya, 15 Apr 1943; Enfidaville, Tunisia, 26 Sep 1943 (detachment operated from Bengasi, Libya, 1-12 Oct 1943), San Pancrazio, Italy, c. 19 Nov 1943-19 Apr 1945, Harvard AAFld, Neb, 8 May-24 Jun 1945. Lockbourne AFB, Ohio, 1 Dec 1958-1 Jan 1962.

Aircraft. B-24, 1942-1945. B-47, 1958-1961; E-47, 1961.

Operations. Combat in ETO and MTO, 1 Nov 1942-15 Apr 1945. Primarily electronic countermeasures, 1 Dec 1958-1 Jan 1962.

Service Streamers. None.

Campaigns. Egypt-Libya; Air Offensive, Europe; Tunisia; Sicily; Naples-Foggia; Anzio, Rome-Arno; Normandy; Northern France; Southern France; North Apennines; Rhineland; Central Europe; Po Valley; Air Combat, EAME Theater.

Decorations. Distinguished Unit Citations: North Africa and Sicily, [Nov] 1942-17 Aug 1943; Ploesti, Rumania, 1 Aug 1943; Bratislava, Czechoslovakia, 16 Jun 1944.

Emblem. On a white square, corners rounded, border black, three red imps of Satan, riding a large light blue aerial bomb, nose toward dexter base. (Approved 6 Jan 1944.)