against the invading Ottoman Empire. The bishop was thus first secretly involved at the pope to solicit financial aid for Matthias' military campaign. The city's distant surroundings quickly became a target for Ottoman raids. As the raids were becoming more frequent, one of them reached Knin, where a Franciscan monastery has been recorded to have been destroyed in 1469. In 1493, the first direct attempt of siege by the Ottomans was undertaken, which was followed by ban John Corvinus and his deputies invading and pillaging the Ottoman territories from the city. The Republic of Venice started to financially support the city's defences in fear for its possessions in Dalmatia. In 1501, three Ottoman spies were caught and imprisoned by the vice-ban. They were sent by the Sanjak-bey of Bosnia, and had infiltrated Knin posing as friars that were on their way to sell vestments to the market. They were to investigate the situation in the Zadar surrounding. The last major conflict around Knin before the truce was in September 1502 when 2,000 Ottoman cavalrymen looted the area. On 20 August 1503 King Vladislaus II concluded a 7-year peace treaty with Sultan Bayezid II. The armistice was generally respected by all sides, during which Knin's defensive positions were strengthened in 1504. A period of severe famine started in 1505 that affected entire Dalmatia. In 1510 the plague halved Knin's population. In 1510 around 1,000 Ottoman Akıncı raided the countryside of Knin. There had been word that viceban of Croatia was captured on that occasion. Baltazar Baćan (), viceban of Slavonia, together with forces from the Zagreb Bishopry, managed to lift the siege of Knin in January 1513. Next year in February the Ottomans laid siege on Knin with 10,000 men from the Sanjak of Bosnia, but were unable to take the city and lost 500 troops. Knin's burg and outskirts were burned on this occasion. These clashes left Knin devastated and there was no news about the city for five years. Local population was decimated by war, hunger, plague and migration to safer places, and its economy was hindered by the seizure of crops and livestock. Due to Knin's strategic value, King Louis II responded to requests from captains of Knin, Skradin and Ostrovica and promised reinforcements of 1,000 infantry and 1,000 cavalrymen. However, it is unlikely that these forces arrived to the endangered towns. On 29 May 1522 after the