The Ottomans, with an army 38,000 strong, commanded by the Bosnian Beyelerbey Hasan Predojevi (c. 1530  22 June 1593), needed to win the Battle of Sisak in order to expand northward into central Europe virtually unopposed
The Battle of Sisak (Croatian: Bitka kod Siska; Slovene: Bitka pri Sisku; German: Schlacht bei Sissek; Turkish: Kulpa Bozgunu) was fought on 22 June 1593 between Ottoman regional forces of Telli Hasan Pasha, a notable commander (Beglerbeg) of the Eyalet of Bosnia, and a combined Christian army from the Habsburg lands, mainly Kingdom of Croatia and Inner Austria. 
