In the first half of the 17th century, Croats fought in the Thirty Years' War on the side of Holy Roman Empire, mostly as light cavalry under command of imperial generalissimo Albrecht von Wallenstein. Croatian Ban, Juraj V Zrinski, also fought in the war, but died in a military camp near Bratislava, Slovakia, as he was poisoned by von Wallenstein after a verbal duel. His son, future ban and captain-general of Croatia, Nikola Zrinski, participated during the closing stages of the war.