During the Fifteen Years War, he was unlawfully authorized to recover the war tax in Slavonia. He participated in the Battle of Pákozd on 3 November 1593, and the Siege of Petrinja in the summer of 1595. He was one of Rudolf's three delegates who took over the control of Transylvania from Prince Sigismund Báthory in 1598. He was also present at the Siege of Nagykanizsa (1600), when the town fell to Tiryaki Hasan Pasha and became the capital of the newly established Kanije Eyalet. One year later, the Christian armies tried to recapture the town but suffered a heavy and decisive defeat.
