In April 1919, following the order of commandant of Greater Poland Front, General Jozef Dowbor-Musnicki, a cavalry unit was formed in Poznań.
In July 1919, the unit was named 4th Greater Poland Uhlan Regiment, with Colonel August Brochwitz-Donimirski (former officer of the Imperial German Army) as its commandant.
The unit was tasked with seizing parts of formerly German province of West Prussia, which were attached to Poland (see Polish Corridor).
In early summer 1920, Pomeranian uhlans fought in northeastern corner of the Second Polish Republic, along the Daugava (river), where it engaged Soviet cavalry under Hayk Bzhishkyan.
Fearing disarmament by the Latvian authorities, the Poles marched towards the port of Memel, which at that time was a free city, occupied by French troops.
On September 19, the unit was attached to Operational Group of General Wladyslaw Jung, and was sent to the frontline near Vawkavysk, to fight in the Battle of the Niemen River.
In recognition of extraordinary service of Pomeranian uhlans during the Polish-Soviet War, the flag was awarded Silver Cross of the Virtuti Militari.