"Bataille de Wagram. 6 Juillet 1809." (Horace Vernet, 1836). In the Galerie des Batailles, Château de Versailles, France. The Battle of Wagram (5-6 July 1809), 10 kilometers north of Vienna,was one of Emperor Napoléon I's great victories (he defeated the Austrians) and the decisive battle of the War of the Fifth Coalition. The floor around the Emperor's tomb bears the names of his more famous victories, including Wagram.