The first half of the 15th century saw the Van region become a land of conflict as it was disputed by the Ottoman Empire and the neighboring Persian Safavid Empire. The Safavids captured Van in 1502, as it went naturally with all former territories of the Ak Koyunlu. The Ottomans took the city in 1515 following the climactic Battle of Chaldiran and held it for a short period. The Safavids retook it again in 1520 but the Ottomans gained an almost definite hold of it in 1548 during another Ottoman-Safavid War. Ottoman control over the town got confirmed in the 1555 Peace of Amasya which came as a result after the end of the war. They first made Van into a sanjak dependent on the Erzurum eyalet, and later into a separate Van eyalet in about 1570. In 1602, the Safavids under king Abbas the Great recaptured Van alongside other swaths of lost territories in Eastern Anatolia. However, Ottoman control over it was at last now made final and definite in 1639 with the Treaty of Zuhab.