Produced since 1935 7TP tank was inspired by Vickers 6-ton mark E, but many improvements were introduced to the project. That included more powerful engine, better armor and a 37mm anti-tank Bofors gun. Prior to September 1939 only about 130 7TPs were ready for combat, making it impossible to stand against German Blitzkrieg doctrine. Despite that, Polish 7TP was considered one of the best light tanks in that period. The tank was far superior than German Pz-1 and Pz-2 and comparable with early Pz-3 versions. High-power AT gun was able to destroy almost every enemy vehicle but 7TPs could not stand chance against German overwhelming numbers, both in armored and air forces. One of the main flaws of the design was 3-men crew, forcing tank commander to operate AT gun and co-axial Browning MG.
7TPs were assigned mostly to 1st Light Tank Batalion and 2nd Light Tank Batalion. Some of the tanks also took part in the defence of Warsaw during 8th -27th Septebmer. Best combat results achieved 1st LTB, but due to dominating enemy forces and lack of fuel Polish forces could not stop German offensive. Even so Polish 7TP tanks were force to be reckoned with, matching German armored units both in traning and firepower.