The Battle of Wagram, around the isle of Lobau on the Danube and on the plain of the Marchfeld around the village of Wagram 15 km north east of Vienna, Austria, took place on July 5 and 6, 1809 and resulted in the decisive victory of French forces under Napoleon Bonaparte over the Austrians under Archduke Charles.

Artillery was a major factor where 300,000 men clashed in the largest battle yet in the Napoleonic Wars. Of those, 80,000 men lay killed or wounded, half of them under the Banner of Napoleon, the other half Austrians.
It brought to an end the war of the Fifth Coalition.