37th Łęczyca Infantry Regiment
The 37th Łęczyca Infantry Regiment of Polish Armed Forces, named after Prince Józef Poniatowski, was a military unit that traced its heritage to the 4th Infantry Regiment of the Duchy of Warsaw. Its origins date back to November 1918 in Przemyśl, and it officially became the 37th Infantry Regiment on 25 February 1919.
Source: Wikipedia — 37th Łęczyca Infantry Regiment (CC BY-SA 4.0)