At the Battle of Wagram on 6 July 1809, Napoleon ordered Lauriston to form a grand battery to stop the surprise Austrian attack against his left flank. To provide time, the emperor directed General Étienne Marie Antoine Champion de Nansouty's heavy cavalry to charge. While Nansouty's cuirassiers and carabiniers sacrificed themselves in futile attacks on the Austrians, Lauriston assembled 112 artillery pieces for his huge battery. He gathered all 60 guns from the Imperial Guard, 24 guns from General Karl Philipp von Wrede's Bavarian division, and 38 pieces from Eugène's Army of Italy. He advanced the batteries into grapeshot range, unlimbered the guns, and opened fire. In the face of this terrific blizzard of lead, the Austrian III "Armeekorps" of General Johann Kollowrat halted and edged back out of the firing range. The barrage allowed time for Napoleon to organize a successful counterattack.