In the summer of 1813, after the disastrous invasion of Russia, Dwernicki became commandant of the 8th Uhlan Regiment, with which he fought in France and Germany. After the Battle of Wartenberg (October 3, 1813), Napoleon Bonaparte personally awarded him Golden Cross of the Legion of Honour. Dwernicki also distinguished himself in the Battle of Leipzig. On January 4, 1814, he was promoted to the rank of Colonel, and became commandant of the Krakus Regiment, with which he fought in the suburbs of Paris.