The Pomeranian uhlans remained in Torun until mid-September 1920, when they were transported by rail to Hajnowka. At that time, the regiment had 32 officers, 630 soldiers and 610 horses. On September 19, the unit was attached to Operational Group of General Wladyslaw Jung, and was sent to the frontline near Wolkowysk, to fight in the Battle of the Niemen River. Pomeranian uhlans remained in eastern Poland until May 5, 1921, when they returned to Grudziadz.