Wagram (väˈgräm) [key] or Deutsch-Wagram doich–, town, Lower Austria prov., NE Austria, in the Marchfeld, near Vienna. On July 5–6, 1809, Napoleon I gained one of his most brilliant victories there. Despite their heroic conduct and the able leadership of Archduke Charles, the Austrians were forced to fall back by French field artillery fire. Napoleon's "grand battery" of 100 guns was the largest concentration of artillery that had until then been used for massed fire. More than 70,000 casualties resulted from the battle. Six days later, Austria was forced to conclude an armistice.