Oberst Rosselmini commanded the "Kaiser" Infantry Regiment # 1 from 1789 to 1794. He led his regiment in Dagobert von Wurmser's Army of the Upper Rhine, fighting at Bad Bergzabern and Bienwaldmühle on 12 and 20 September. He also fought at the First Battle of Wissembourg on 13 October. He won promotion to General-Major on 20 February 1794. He held the noble title of Ritter.