In the Battle of Krojanty Polish cavalry acted as horse mounted infantry. Elements of 18th Uhlans Regiment successfully attacked a German infantry battalion, but were then counterattacked by German mechanized unit.

"Contrary to German and Italian propaganda, Polish cavalry brigades never charged tanks with their sabres or lances as they were equipped with anti-tank weapons such as 37mm Bofors wz.36 (exported to UK as Ordnance Q.F. 37mm Mk I) anti-tank guns, that could penetrate 26mm armour at 600m at 30 degrees. The cavalry brigades were in the process of being reorganized into motorized brigades."