On 26 May 1727 he became a Major-General in the Saxon Army and shortly after he served under the Prussians; however, in 1729 he returned again to the Saxon Army. During the following years, in the War of Polish Succession, he participated in the campaigns in Poland and on the Rhine, becoming Lieutenant-General on 1 January 1736 and Commander of the "Garde du Corps". As such he was in 1737 the leader of the Saxon Contingent in the War against the Turks in Hungary.