Dossow participated in Hungary against the Ottoman Turks and against France in the Rhineland. When King Frederick William I began his campaign to conquer Pomerania from Sweden in 1715, Dossow held the rank of "Major". Later that year, Dossow was the "Generaladjutant" to Leopold I of Anhalt-Dessau during the capture of Rügen and siege of Stralsund.