4th Line Infantry Regiment (Congress Poland)

After Napoleon lost control of Poland in 1812, the regiment remained loyal to the emperor and fought in battles of Leipzig and Arcis-sur-Aube.

[2] Because of the proximity of the barracks to the Grand Duke Konstantin Pavlovich's palace, the 4th Regiment became one of his favourite military units and its soldiers enjoyed the status of his personal guard.

This meant that the Grand Duke, very fond of his military units, while also cruel and brutal in their treatment, would march the regiment's soldiers days and nights, in every weather.

[1] Officially named the "4th Line Infantry Regiment", the soldiers of the new unit continued to use the nickname of Czwartacy ("Men of the Fourth"), which had achieved some notoriety.

[4] This nickname was popularised in Europe by a German poet Julius Mosen, who published in 1832 a popular poem idealising the regiment and its actions during the war of 1830-1831.