The 2nd Grochów Uhlan Regiment of General Jozef Dwernicki (Polish: 2 Pułk Ułanów Grochowskich im.

Second Uhlan Regiment was formed in November 1917 in Antoniny, Volhynia, a village which at that time belonged to the House of Potocki.

Soon afterwards the regiment joined Polish I Corps in Russia, and its two squadrons were made of ethnic Poles, who had served in Russian 2nd Guards Cavalry Division.

First regimental order was issued on December 14, 1917, and in January–February 1918, the unit was strengthened by mounted artillery and third cavalry squadron.

Its squadrons were located in Łódź, Łowicz and Siedlce, while the headquarters, commanded by Colonel Mieczyslaw Kudelski, were placed in Warsaw.

1st Squadron fought along rail line from Chełm to Kowel, as part of Operational Group of Edward Rydz-Śmigły.

In late July 1919, three squadrons concentrated near Zbaraz, and spent the winter of 1919/1920 patrolling the border along the Sluch river.

Second Regiment decided then to cross the border and enter East Prussia, reaching the village of Mierunksen (Mieruniszki).

In the evening of September 7, General Zygmunt Podhorski ordered the unit to move to the forests east of Zambrów, and prepare defensive positions analog the Narew river.

Since 18th Infantry Division was unable to keep its positions fighting against General Heinz Guderian's XIX Panzer Corps, Colonel Anders divided the regiment into two columns and retreat to Wolkowysk.

On September 29, Cavalry Division Zaza merged with Independent Operational Group Polesie, and the united force fought in the Battle of Kock.

Polish Attaché at Kaunas sent the flag in a diplomatic package to France, and finally it ended up in Great Britain.

In the interbellum period, the regiment sent its newly promoted officers to the tomb of its patron, General Józef Dwernicki, located in Lopatyn near Brody (current Ukraine).

In 1995–2000, the traditions of Second Uhlan Regiment were continued by 2nd Tank Battalion of 4th Suwałki Armored Cavalry Brigade from Orzysz.