In 1793 he served in the Army of the Upper Rhine, under General of Cavalry Graf Wurmser. In 1794 he fought on the Rhine, under "Feldzeugmeister" (General of Infantry) Friedrich Wilhelm, Fürst zu Hohenlohe-Kirchberg and was distinguished in the actions near Kaiserslautern (20 September) and Oggersheim (9 October). On 11 October of that year Prince Friedrich was promoted to Major General. In 1795, the prince took part in the successful assault on Mainz (29 October) and was victorious in the action at Bacharach (17 December). In 1796 he served in Germany under Archduke Charles and was present at the Battle of Würzburg as a cavalry brigade commander.