The Byzantine-Seljuk Wars were a series of conflicts between the Byzantine Empire and the Seljuk Turks during the 11th and 12th centuries. These wars were primarily fought over control of territories in Anatolia, which was crucial for both empires. The Seljuks aimed to expand their influence, while the Byzantines sought to defend their lands and maintain their power. One of the most significant battles in these wars was the Battle of Manzikert in 1071, where the Byzantines suffered a major defeat. This loss opened the door for further Seljuk expansion into Anatolia, leading to significant changes in the region's political landscape and contributing to the eventual decline of the Byzantine Empire.