 Complete the following phrase:  The III Cavalry Corps of the Grande Armée was a French military unit that existed during the Napoleonic Wars. The corps was created in 1812 and reconstituted in 1813 and 1815. Emperor Napoleon Bonaparte first mobilized the corps for the invasion of Russia. Commanded by General Emmanuel de Grouchy, two divisions of the corps fought at Borodino, Tarutino, and Vyazma. A third division fought at the 