Constituted 2nd Bombardment Squadron on 1 Jan 1938. Redesignated 2nd Bombardment Squadron (Medium). Activated on 1 Feb 1940. Redesignated: 2nd Bombardment Squadron (Heavy) on 3 Feb 1944; 2nd Bombardment Squadron (Very Heavy) on 30 Apr 1946; 2nd Bombardment Squadron (Medium) on 28 Jul 1948; 2nd Bombardment Squadron (Heavy) on 15 Sep 1963. Inactivated on 1 Oct 1982. Thanks to www.flightlineinsignia.com for the information.
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