Katzianer's Campaign

In August 1537 Katzianer's army was encamped near Koprivnica and in September they started marching eastwards towards Virovitica. Disagreements soon inflamed between Katzianer and Schlick over the command of the troops as well as between Czech and Styrian soldiers in the army. By September 10 Katzianer's forces reached Virovitica where they ran out of food and became further eroded by maladies due to the autumn rains.

By mid-September, the army reached Valpovo where they started making preparations for a strike on Osijek, however, Ottomans sent a 5,000 strong reinforcement to the town which mitigated Katzianer's chances for a regular siege. After achieving nothing near Osijek, the army attempted to withdraw back to Valpovo, however Ottomans had cut off their way so instead they decided to maneuver southwest into swampy areas around Vuka river, while also being constantly harassed by the Ottoman attacks. By October 7, the hungry and exhausted army reached Gorjani, hoping to march north towards Valpovo in search for food, however remaining troops found out that Katzianer and some other leading commanders had already deserted them. The remnants of this army were crushed by the Ottomans in the ensuing Battle of Gorjani.

Disaster of this campaign enraged Emperor Ferdinand so Katzianer was tried for cowardice and thrown in prison. He subsequently escaped prison and killed a peasant along the way, only to be captured and executed in 1539 on orders of Nikola IV Zrinski.

• Kacijaner, Ivan, Croatian Encyclopedia
• Klaić, Vjekoslav, History of the Croats (Povijest Hrvata), Matica hrvatska, 1988.
• Tracy, James D. (2016). Balkan Wars: Habsburg Croatia, Ottoman Bosnia, and Venetian Dalmatia, 1499–1617. Rowman & Littlefield Publishers. ISBN 978-1-4422-1360-9.