In 1805, Argenteau led a division in the army of Archduke Charles in northern Italy. At the Battle of Caldiero in October, he commanded five divisions of the Center of the army. At his retirement from military service in 1808, he was appointed "Feldzeugmeister", full general. From 1809 until his death in 1819, he was proprietor ("inhaber") of the "Argenteau" Infantry Regiment Nr. 35. He died in Vienna.