In the War of the Second Coalition, the 4th Hussars fought with Lefebvre's division of Jourdan's Army of the Rhine in the Battle of Ostrach on 21 March 1799 and the First Battle of Stockach four days later. The regiment participated in the Second Battle of Zurich on 25–26 September 1799 in Édouard Mortier's 8th Division of André Masséna's Army of the Danube. At the start of the 1800 campaign the 4th Hussars were assigned to Antoine Guillaume Delmas' division of Jean Victor Marie Moreau's Army of the Rhine. Delmas' division fought at the Second Battle of Stockach on 3 May 1800.