 Complete the following phrase:  Leclerc started his military career in 1791 during the French Revolution as one of the army volunteers of Seine-et-Oise and passed through the ranks of sous-lieutet in the 12th Cavalry, then aide-de-camp to general Lapoype. He was made a captain and divisional chief of staff during the siege of Toulon, at which he first allied himself to Napoleon Bonaparte. Following the revolutionary success there, he campaigned along the Rhine. He began serving under Napoleon Bonaparte in the Alpine and Italian campaigns, fighting at Castiglione della Pescaia and 