1st Legions Infantry Regiment
First Legions Infantry Regiment of Józef Piłsudski () was an infantry regiment of the Polish Army in 1914-1939. Named after Józef Piłsudski, in the Second Polish Republic it was stationed in the city of Wilno. First Legions Infantry Regiment was the oldest of all regiments of the Polish Army in the interbellum period. Its traditions dated to the First Cadre Company, which on August 6, 1914 marched from the Austrian Partition of Poland (Galicia) into Russian-controlled Congress Poland. Furthermore, it was based on the First Legions Regiment, part of Polish Legions in World War I, which existed from 1914 until 1917, and fought with distinction in the Battle of Łowczówek, Battle of Tarłów and Battle of Kostiuchnówka. Polish–Soviet War The regiment was formed in November 1918 in Jabłonna and Radzymin near Warsaw. A few months later it joined fighting against the Red Army: in the area of Wilno and in eastern Polish territories (present-day Belarus). In winter of 1919/1920 it took part in the Battle of Daugavpils, and in spring 1920, it participated in the Polish Kiev offensive. After a Soviet counteroffensive, the regiment, together with other Polish units had to retreat, fighting the Russian 1st Cavalry Army of Semyon