La Bataille de Deutsch-Wagram

Other than the Battle of Nations of October 1813, the Battle of Wagram, fought on 5-6 July 1809, was the largest engagement of the Napoleonic Wars, indeed of the early nineteenth century. Along a front of 14 miles, 300,000 French and Austrian troops supported by almost 1500 guns clashed for two days. Combined casualties reached 72,000. If perhaps not as brilliant a victory as Austerlitz four years earlier - the Austrian army retired in good order and still combat capable - it was none the less a decisive victory for the French, the last Napoleonic victory to break the enemy's will to continue fighting.

Gunther Rothenberg - "The Emperor's Last Victory"