Pari gbolohun ti o tẹle: Alexander bẹrẹ iṣẹ ni ọmọ ogun Württemberg bi ọga agba ni 21 Kẹrin 1791, o si gbe lọ si ọmọ ogun Austria, ti o ṣiṣẹ lakoko ipolongo lodi si Faranse ni ọdun 1796-1799, o si kopa ninu awọn ogun ti Rastadt, Würtzburg, Offenbach, Stockach ati
Ìlú Zurich. Ní ọdún 1796 Ọmọọba Alexander di Major General àti Fieldmarshal Lieutenant nínú àwọn ọmọ ogun Austria ní ọdún 1798.