Supporting the skirmishers was the French artillery. The artillery had suffered least from the exodus of aristocratic officers during the early days of the Revolution, as it was commanded mostly by men drawn from the middle class. The man who would shape the era, Napoleon Bonaparte, himself was an artilleryman. The various technical improvements of Général Jean Baptiste Vaquette de Gribeauval in the years preceding the Revolution, and the subsequent efforts of Baron du Teil and his brother Chevalier Jean du Teil meant that the French artillery was the finest in Europe. The Revolutionary Artillery was responsible for several of the Republic's early victories; for example at Valmy, on 13 Vendémiaire, and at Lodi. The revolutionary cannon played a vital role in their success. The cannon continued to have a dominating role on the battlefield throughout the Napoleonic Wars.