Siege of Gvozdansko
1578 CE.
Shown on the map at 45.133°, 16.215°.
The siege of Gvozdansko (Croatian: Opsada Gvozdanskog) was an Ottoman siege of the fort of Gvozdansko in the Kingdom of Croatia in 1577–1578. In the 1570s, the Ottomans intensified their efforts to capture the valley of the Una River. A string of forts along the Una, centred around Gvozdansko and in possession of the Zrinski noble family, formed the main line of defense of Croatia since 1527. The fort held off Ottoman attacks in 1540 and 1561. In 1575, Ferhad Bey Sokolović, Sanjak-bey of Bosnia, began an offensive on central Croatia. By the end of 1576, the defense system on the Una collapsed and most of the forts in the valley were captured, including Bužim and Cazin. While Gvozdansko withheld an attack in June after three days of fighting, the attack left the walls of the fort damaged. Ferhad Bey renewed the campaign in September 1577 and attacked the remaining Croatian-held forts in the area. The Ottoman army besieged Gvozdansko on 3 October, whose garrison numbered 300 soldiers and miners, under the command of Damjan Doktorović and three other Croatian captains. With the capture of the nearby fort of Zrin on 20 December, Gvozdansko was left completely isolated.
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