Carrière was promoted to "Chef de brigade" on 17 April 1801, and became Colonel of the on 1 February 1805. He led this regiment in V Corps of the "Grande Armée" under the command of Marshal Jean Lannes, fighting at Wertingen, Ulm, Amstetten and Austerlitz. During a cavalry charge at Wertingen, his horse carried him into the midst of a regiment of Austrian cuirassiers. He captured a captain of that corps, and killed several horsemen who tried to free their leader.