シュレージエン戦争
In October 1744, he was appointed minister plenipotentiary in the Austrian Netherlands, while its governor, Prince Charles of Lorraine, fought in the Silesian Wars, commanding the Austrian army in Bohemia against King Frederick II of Prussia. Upon the December 1744 death of Charles' consort and co-governor, Archduchess Maria Anna, a sister of Maria Theresa, Kaunitz was virtually the head of government.