On 22 June 1593, the day of Saint Acacius, the leader of the
Ten thousand martyrs, a battle occurred near the fortress of
Sisak in present-day
Croatia, where the
Sava and
Kupa rivers meet. It was the last fortress the
Ottomans needed to conquer in order to expand northward into central Europe virtually unopposed. Sources report that the Ottoman army attacking the fortress was 38,000 strong, commanded by the Bosnian
beylerbey (governor-general),
Hasan Pasha (born Niko Predojević). The Carniolan army under the command of the
Ban of Croatia,
Tamás Erdődy, which was defending the fort counted only 4,000 to 5,000 men led by Andreas von Auersperg and
Ruprecht von Eggenberg and reinforced by 1,240 Croatian horsemen and 500
Silesian mounted riflemen. Hasan Pasha attacked with his main force but was repelled by the heavy fire of the defending army. The Turks then retreated to the bridge they had just crossed, but Auersperg sent the arquebusars to capture the bridge. The Ottomans were then forced to swim to the other side of the river. About 8,000 Ottomans died during the retreat, including Hasan Pasha, who drowned in the river. The remaining Ottomans (who were guarding the camp) set their gunpowder on fire and fled. Thus, Auersperg won the Battle of Sisak and saved central Europe from imminent Ottoman invasion, whereupon
Pope Clement VIII sent the Protestant—who was nicknamed the "Carniolan Achilles" or even the "Christian Achill(es)" and called "the Terror of the Turks"—a handwritten letter of congratulation. Andreas von Auersperg died unmarried in Karlovac three months later. ==References==