21st Vistula Uhlan Regiment

Due to efforts of Colonel Bronislaw Zaniewski, who commanded the Border Rifles, a cavalry regiment was created, based on the NCOs from both schools.

As Polish offensive had begun, the regiment crossed the Vistula near Wyszogród (August 20), chasing after the retreating Soviet cavalry of Hayk Bzhishkyan.

Unable to escape Polish encirclement, Soviet forces entered East Prussia near Kolno.

Since a number of Soviet and Lithuanian soldiers remained in local forests, the regiment had to fight them almost daily.

On October 20, 1920, the unit was named 21st Vistula Uhlan Regiment, and was ordered to guard Polish–Lithuanian demarcation line.

It featured the Polish eagle, from the 16th century, the coat of arms of Volhynia, the number 21, and the inscription "Honour and Fatherland".