42d Bombardment Squadron, Heavy

Organized as 42 Aero Squadron on 13 Jun 1917. Redesignated as Squadron I, Wilbur Wright Fld, OH, on 1 Oct 1918. Demobilized on 21 Feb 1919. Reconstituted and consolidated (1924) with 42 Squadron which was authorized on 10 Jun 1922. Organized on 5 Jul 1922. Redesignated as: 42 School Squadron on 25 Jan 1923; 42 Bombardment Squadron on 1 Mar 1935. Inactivated on 1 Sep 1936. Redesignated as 42 Bombardment Squadron (Medium) on 22 Dec 1939. Activated on 1 Feb 1940. Redesignated as: 42 Bombardment Squadron (Heavy) on 11 Dec 1940; 42 Bombardment Squadron (Very Heavy) on 30 Apr 1946. Inactivated on 20 Oct 1948. Redesignated as 42 Bombardment Squadron (Heavy), and activated, on 1 Dec 1948. Discontinued, and inactivated, on 1 Feb 1963.