He was made a Count of the Empire in 1808 and received a divisional command in the Army of Germany, with which he would campaign in southern Germany and Austria. On 22 April 1809, Saint-Hilaire distinguished himself under Napoleon's eyes at the Battle of Eckmühl.
Saint-Hilaire was appointed Count of the Empire in 1808 and given control of a division within the German Army, which he led on campaigns in southern Germany and Austria. On April 22, 1809, Saint-Hilaire demonstrated his bravery under Napoleon's observation at the Battle of Eckmühl.