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 First and Second battles of Polotsk and the Berezina. During the War of the Sixth Coalition in 1813, General Jean-Toussaint Arrighi de Casanova led the corps at Großbeeren, Dennewitz, Leipzig, and Hanau. During the Hundred Days in 1815, Napoleon reorganized the corps and appointed General François Étienne de Kellermann to lead it. One brigade of the corps was engaged at Quatre Bras and both divisions fought at Waterloo.