As part of Edward Rydz-Śmigły's Third Army, the regiment fought in the 1920 Kiev Offensive. It protected the Polish rear during the retreat of early summer 1920, and then fought against the Soviets in the bloody Battle of Cycow. In this battle, together with 7th Lublin Uhlan Regiment, it formed the 4th Cavalry Brigade. After the battle, the regiment chased the enemy towards Białystok and Augustów, where it clashed with Lithuanian troops, advancing southwards. It then fought in the Battle of the Niemen River, remaining along Polish–Soviet demarcation line until mid-1921.