In 1793 during the War of the First Coalition, he distinguished himself in the battles of Neerwinden and Wattignies. He participated in the Flanders campaign in 1794 under Prince Josias of Saxe-Coburg-Saalfeld. He served under Dagobert Sigmund von Wurmser in the successful Siege of Mannheim which capitulated on 22 November 1795. He was promoted to Feldmarschal-Leutnant in March 1796.