Брусиловский прорыв
On 29 August 1916, after the brutal summer campaigns succeeded in reversing the Brusilov Offensive against the Austrians, Leopold became the Supreme Commander of the German forces on the Eastern front ("Oberbefehlshaber Ost"), succeeding Field Marshal Paul von Hindenburg. Leopold held this post for the rest of the war. Because of his position, Leopold was a potential German candidate for the throne of the puppet Kingdom of Poland.