Bosnia had suffered Ottoman incursions, starting in 1386. The first Turkish entry into Zenica relates to their win over Hungarian warriors near Doboj in 1415. Zenica has been mentioned under today's name since that event. The first official record of the city's name is in the document dated 16 March 1436; the document relates to the invasion and robbery of Hum done by the Ottoman Duke Barak who retreated towards Zenica and there received Ragusan money in the name of redemption. Since that event until complete establishment of Ottomans in Bosnia (1463) there are no obtainable mentions of Zenica in relevant documents; that is a reason why this era in the city's history cannot be reasonably covered in detail.