While the other two brigades of Nansouty's division fought at the Battle of Aspern-Essling on 22 May, sources are not clear if Doumerc's brigade participated. At the time of the Battle of Wagram, the 2nd Cuirassiers numbered 708 horsemen while the 9th counted 776 troopers. On 6 July, Archduke Charles, Duke of Teschen launched a dangerous counterattack against the French left wing. Napoleon threw Nansouty's division at Johann Kollowrat's Austrian III Armeekorps in attempt to stop his enemies. The charge drove a wedge between Kollowrat and the neighboring I Reserve Armeekorps, but was ultimately repulsed. The division lost 164 men killed, 436 men wounded, and 1,141 horses destroyed. Doumerc's 9th Cuirassiers lost its colonel and six officers wounded, 31 killed and 55 wounded. Even though the effort failed, it allowed Napoleon to gain the initiative. After this moment in the battle, the Austrian were forced to react to French maneuvers.