Lineage: Organized as 20 Aero Squadron on 13 Jun 1917. Redesignated as 25 Aero Squadron on 22 Jun 1917. Demobilized on 17 Jun 1919. Reconstituted, and consolidated (1924), with 25 Squadron, which was authorized on 30 Aug 1921. Organized on 1 Oct 1921. Redesignated as: 25 Bombardment Squadron on