The First Battle of Bar-sur-Aube was fought during the War of the Sixth Coalition when Marshal Édouard Mortier, duc de Trévise's corps of French Imperial Guards defended against an Austrians corps under Ignaz Gyulai and a Württemberger corps led by Crown Prince Frederick William of Württemberg. After holding his main defensive positions in stiff fighting, Mortier withdrew his elite troops during the night and retreated to Troyes. Bar-sur-Aube is located 53 kilometres (33 mi) east of Troyes.