They also participated in the Polish-Soviet War, which by 1920 most of the French personnel had departed back to France. In July 1920, FTs tanks were used in the Defense of Grodno and defense of Lida, and Rowne as well as the Battle of Daugavpils. Then, they took part in the great Warsaw Battle in August 1920 and some damaged tanks were put on railway flatcars and used as parts of armoured trains.