Finally, generals Wittgenstein and Blücher were ordered to stop at Bautzen by Tsar Alexander I and König Frederick William III.
He left Paris and was a captain in the 1813 Saxony campaign, assisting at the battles of Lützen and Bautzen (at the latter he was decorated personally by Napoleon).
Following the Battle of Bautzen, Napoleon created him a Count of the Empire (22 May 1813) and less than a week later, Pacthod captured 8,000 Prussians, at the Battle of Hoyerswerda (27 May 1813).
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He joined the retreat from Russia, and later distinguished himself at the battles of Lutzen, Bautzen, Dennewitz, Hanau, and Hochheim in the War of the Sixth Coalition as the Allies defeated Napoleon.
In 1813, Langeron was put in charge of the blockade of Thorn, and later that year he commanded a corps at Koenigswarte, Bautzen, Siebeneichen, Lowenberg, Katzbach, and Leipzig.