The Kayi tribe is a historical group from the Oghuz Turks, known for their role in the formation of the Ottoman Empire. They were primarily located in the region of Anatolia during the 13th century and are often associated with the legendary figure Ertuğrul Bey, who is considered a founding ancestor of the Ottoman dynasty. The Kayi tribe was characterized by their nomadic lifestyle, skilled horsemanship, and warrior culture. They played a significant role in the expansion of the Ottoman state, contributing to its military strength and governance. Their legacy continues to be celebrated in modern Turkish culture and media.