The tank force consisted of two armored brigades, four independent tank battalions and some 30 companies of TKS tankettes attached to infantry divisions and cavalry brigades.
Before the war, in 1939, the Polish Army still had 102 light tanks FT-17, of those 70 in the 2nd armoured battalion in Żurawica and 32 in two Armoured Trains' Units (as armoured draisines), some of these tanks were "iron" FT-17 CWS.