At the Battle of Wagram on 5 and 6 July, Marulaz led the 23rd Chasseurs, Hesse-Darmstadt Chevaulégers, 1st Prince Royal Bavarian Chevauléger Regiment, and two Bavarian 6-pounder artillery batteries, a total of 1,223 sabers, 301 gunners, and 12 cannons. His other regiments were on detached duty. In the early hours of the first day, Marulaz crossed to the north bank with the rest of the IV Corps. Masséna posted his infantry with its left flank on the river and sent Marulaz and Lasalle to guard his right flank. While the infantry overran the Austrian riverbank defenses, the cavalry helped clear away some stray enemy units. Later in the day, he deployed on the left flank with IV Corps and missed the unsuccessful late afternoon attack. At 2:00 am on 6 July, Masséna shifted his corps toward the center, leaving only Jean Boudet's infantry division holding the left flank. That morning Archduke Charles launched a dangerous attack on the French left flank and succeeded in defeating Boudet's troops. At 11:00 am, Napoleon sent Masséna to retake the ground on the left. Marulaz made several charges to help Boudet's troops, then he managed to surprise and overrun an Austrian artillery battery. The guns were quickly retaken by enemy hussars, but with Lasalle's assistance, the hussars were driven away and two cannons captured. This incident marked the high tide of the Austrian advance. During the pursuit, Marulaz's troopers proved unable to break two steady Austrian squares. A 12-pounder battery was brought up to blast the enemy, and the chase went on. When an Austrian bullet fatally struck Lasalle, Marulaz made a speech to his old 8th Hussars from Lasalle's division, reminding them he was their former colonel. Ending the harangue with, "You will charge. Marulaz is at your head", he led a charge. He was shot in the arm, but he didn't relinquish command until a cannon shot killed his horse and he was badly stunned in the fall. Pleased with Marulaz's performance, Napoleon promoted him to general of division on 12 July 1809 and appointed him to command the 6th Military Division at Besançon. From 8 January to 20 April 1814, he successfully withstood a siege of Besançon by Prince Aloys Liechtenstein and 12,000 Austrian troops. Marulaz's 9,000-man garrison included elements of the 2nd, 38th, 64th, 93rd, and 154th French Line Infantry Regiments, the 3rd and 4th Swiss Infantry Regiments, and the