Barclay was re-employed in the field and took part in the German Campaign of 1813 and the French Campaign of 1814, which ended the War of the Sixth Coalition (1812–1814). After Kutuzov's death, he once again became commander-in-chief of the Russian forces at the Battle of Bautzen (21 May 1813), and in this capacity he served at Dresden (26–27 August 1813), Kulm (29–30 August 1813) and Leipzig (16–19 October 1813). In the latter battle, he commanded a central part of the Allied forces so effectively that the tsar bestowed upon him the title of count.