21st Lithuanian Infantry Regiment â infantry regiment of the Army of the Duchy of Warsaw.
Formed in 1812 in Biaà Âystok, it was one of five infantry regiments in the former Grand Duchy of Lithuania, which was attempted to be reformed by the Lithuanian Provisional Governing Commission. The regiments were modeled after the Army of the Duchy of Warsaw, and their uniforms were also similar. However, they differed in the badges on their caps. Instead of the coat of arms of Poland (white eagle), they wore the coat of arms of Lithuania (white knight) and their cockades also differed from the Poles â they were white instead of the blue, white, and crimson of the Duchy of Warsaw.
The regiment fought in 1813 in the defense of Modlin. As of May 1, 1813, the regiment's strength was 23 officers and 575 soldiers.
After Napoleon's abdication, Tsar Alexander I of Russia agreed to repatriate PolishâÂÂLithuanian units. They were to serve as a base for the formation of the Army of Congress Poland under the command of Grand Duke Konstantin. On June 13, 1814, the regiment was assigned a concentration site in Siedlce. However, the regiment was not recreated, as the new army provided for only 12 infantry regiments.