However, the Hungarian noblemen, dissatisfied with the disorder, rebelled against his rule, and defeated him at Mirăslău on September 18, 1600. At the same time, the Poles invaded Moldavia and restored Ieremia Movilă to the throne; then they entered Wallachia, where Simion Movilă defeated Michael the Brave at Buzău. In this moment of crisis, Michael the Brave left for Prague to appeal to the emperor for support. He returned to Transylvania in July 1601 at the head of an imperial army. Cooperating with the imperial general, Giorgio Basta, he defeated the Transylvanian troops at Guruslău on August 3, but on August 19 he was assassinated on the order of his former ally, Giorgio Basta.