who were the seljuk turk? How were they establish expand the turk authority?
Answers
The Seljuqs originated from the Qynyk branch of the Oghuz Turks, who in the 9th century lived on the periphery of the Muslim world, north of the Caspian Sea and Aral Sea in their Yabghu Khaganate of the Oghuz confederacy, in the Kazakh Steppe of Turkestan. During the 10th century, due to various events, the Oghuz had come into close contact with Muslim cities.
When Seljuq, the leader of the Seljuq clan, had a falling out with Yabghu, the supreme chieftain of the Oghuz, he split his clan off from the bulk of the Tokuz-Oghuz and set up camp on the west bank of the lower Syr Darya. Around 985, Seljuq converted to Islam. In the 11th century the Seljuqs migrated from their ancestral homelands into mainland Persia, in the province of Khurasan, where they encountered the Ghaznavid empire. In 1025, 40,000 families of Oghuz Turks migrated to the area of Caucasian Albania. The Seljuqs defeated the Ghaznavids at the Battle of Nasa plains in 1035. Tughril, Chaghri, and Yabghu received the insignias of governor, grants of land, and were given the title of dehqan. At the Battle of Dandanaqan they defeated a Ghaznavid army, and after a successful siege of Isfahan by Tughril in 1050/51, they established an empire later called the Great Seljuk Empire. The Seljuqs mixed with the local population and adopted the Persian culture and Persian language in the following decades.