In spring 1593, Beylerbey Telli Hasan Pasha gathered a large army in Petrinja and on 15 June again crossed the Kupa River and started his third attack on Sisak. His Bosnian Ottoman army consisted of around 12,000-16,000 troops from the sanjaks of Klis, Lika, Zvornik, Herzegovina, Pojega, and Cernik. Sisak was defended by at most 800 men commanded by Matija Fintić, who died on 21 June, and Blaž Đurak, both from Kaptol, seat of the Roman Catholic bishop of Zagreb. The town was under heavy artillery fire and a call for help was sent to the Croatian ban. Reinforcements led by Austrian Colonel-General Ruprecht von Eggenberg, Ban Tamás Erdődy, and Colonel Andreas von Auersperg arrived near Sisak on 21 June. They numbered around 4,000-5,000 cavalry and infantry. Mustafa Naima narrates that, after making the preparations before the battle, Hasan Pasha commanded Gazi Hodža Memi Bey, father of Sarhoš Ibrahim Pasha, a renowned military commander, to cross the river and reconnoitre the enemy forces. He reported back that a battle would end in ruin, as the Habsburgs had such a superior force (probably referring to its larger quantity of guns and ammunition). Naima also narrates that after hearing this, Hasan Pasha, who was credited as a fearless military leader, and happened to be playing chess at that very moment, severely responded to him: ""Curse you, you despicable wretch! to be afraid of numbers: out of my sight!"", and then he mounted his horse and began to mobilize the Ottoman forces across the bridges he had previously ordered to be constructed.