Oudinot was elected a member of the chamber of deputies, but had little time to devote to politics. He took a leading role in the war of 1805, commanding the famous division of "grenadiers Oudinot," made up of hand-picked troops and organized by him, with which he seized the Vienna bridges, received a wound at the Battle of Schöngrabern in Lower Austria against the Russians. In 1807, he participated in Joachim Murat's victory in the Battle of Ostrolenka in Poland and fought with resolution and success at the Battle of Friedland.