Marulaz received promotion to Chef de brigade (colonel) of the 8th Hussars on 28 December 1798 in time for the War of the Second Coalition. He fought in the First Battle of Zurich on 4 June 1799, the 8th Hussars being attached to the 7th Division. On 15 June he led a successful raid on an enemy camp, capturing 400 men. He was shot five times, including one ball that passed right through his body from side to side, breaking two ribs. At the start of Jean Moreau's 1800 campaign, the 8th Hussars belonged to Dominique Vandamme's division of Claude Lecourbe's corps. This division fought at the battles of Stockach and Messkirch in April 1800. During the Battle of Hohenlinden campaign that fall, the 8th Hussars were assigned to Charles Gudin's division and fought at Salzburg on 14 December 1800.