built version. SOP. 1A.2 two-seat reconnaissance aircraft SOP. 1B.1 single-seat bomber SOP. 1B.2 two-seat bomber SOP. 1E.2 two-seat trainer LeO 1 Lioré et Olivier licence-built version. So-shiki Model 1 Japanese licence-built bomber version. So-Shiki Model 2 Japanese licence-built LeO 1 reconnaissance version. Operators Military Afghanistan Air Force received a single aircraft from the Soviet Union in September 1921, which remained in existence until at least December 1924. Australian Flying Corps No. 2 Squadron AFC operated one aircraft for training only. No. 4 Squadron AFC used Strutters for training. No. 6 (Training) Squadron AFC in the United Kingdom Aviation Militaire Belge 2ème Escadrille 3ème Escadrille 4ème Escadrille 6ème Escadrille Escola de Aviação Militar used three aircraft for liaison and army co-operation duties. Czechoslovak Legion used four SOP 1 A.2 delivered by the French Aviation Mission in Russia, and at least one Strutter captured from bolsheviks. Estonian Air Force operated a single ex-Soviet aircraft. Aéronautique Militaire – A total of 72 Escadrilles equipped either wholly or partly. Aéronautique Navale Hellenic Navy – Six aircraft used in the Asia Minor Campaign against Turkey, 1918–21. Imperial Japanese Army Air Service Latvian Air Force operated four ex-Soviet aircraft.Humberstone, Richard. Latvian Air Force 1918–1940. London: Blue Rider Publishing, 2000, . Aizsargi Lithuanian Air Force operated a single ex-Soviet aircraft that landed behind Lithuanian lines during the Lithuanian–Soviet War. Two others may also have been operated. Arma de Aviación Militar operated one example (TNCA registration 1-S-68) from c1920–1924. Luchtvaart Afdeling used five Strutters that forced landed in neutral the Netherlands and were interned and subsequently purchased. Polish Air Force operated three aircraft captured from the Soviets in 1919–1920. Romanian Air Corps Imperial Russian Air Force and White Russian forces Soviet Air Force A single aircraft acquired from Russia in 1918. Royal Flying Corps No. 37 Squadron RFC No. 39 Squadron RFC No. 43 Squadron RFC No. 44 Squadron RFC No. 45 Squadron RFC No. 46 Squadron RFC No. 70 Squadron RFC No. 78 Squadron RFC No. 143 Squadron RFC Royal Naval Air Service No. 2 (Naval) Squadron No. 5 (Naval) Squadron No. 8 (Naval) Squadron Aviation Section, U.S. Signal Corps United States Army Air Service 88th Aero Squadron 90th Aero Squadron 99th Aero Squadron United States Navy Civil Two aircraft registered in 1928. R-105 (later LV-BAA) and R-106 (later LV-CAA). One of these two preserved in Florida. 55 aircraft on French civil register in 1922. At least