Kammala jumla mai zuwa: Alexander ya fara aiki a rundunar sojojin Württemberg a matsayin colonel a ranar 21 ga Afrilu, 1791, kuma an tura shi zuwa rundunar sojojin Austriya, yana aiki a lokacin yakin da Faransa ta yi a 1796-1799, kuma ya shiga cikin yakin Rastadt, Würtzburg, Offenbach, Stockach da
Zurich. (Asar Zurich) A shekara ta 1796 Yarima Alexander ya zama Babban Janar kuma Lieutenant Field Marshal a cikin sojojin Austriya a shekara ta 1798.