The Battle of Chaldiran (Persian: جنگ چالدران‎; Turkish: Çaldıran Savaşı) took place on 23 August 1514 and ended with a decisive victory for the Ottoman Empire over the Safavid Empire. As a result, the Ottomans annexed Eastern Anatolia and northern Iraq from Safavid Iran. It marked the first Ottoman expansion into Eastern Anatolia (Western Armenia), and the halt of the Safavid expansion to the west. The Chaldiran battle was just the beginning of 41 years of destructive war, which only ended in 1555 with the Treaty of Amasya. Though Mesopotamia and Eastern Anatolia (Western Armenia) were eventually reconquered by the Safavids under the reign of Shah Abbas the Great (r. 1588–1629), they would be permanently lost to the Ottomans by the 1639 Treaty of Zuhab.