The Seljuks underwent a very troubled period after arriving in Khorasan. When Seljuk Beg died, he was over 100 years old. In his old-age, leaving all else aside, he brought up his grandsons, Togrul and Çagry Begs. The son of Seljuk Beg, Arslan Han, settled on the Nur Plateau near Buhara, taking Togrul and Çagry Begs with himself. The sole aim of the two brothers trained by Seljuk Beg was to make Khorasan their homeland.

To attain their goal, Çagry Beg together with his brave men crossed over Khorasan to reach the Roman Land (Anatolia). The two brothers’ intention to conquer Khorasan intensified after the arrest and imprisonment of Arslan Beg by Gaznaly Mahmyt.

After crossing the Jeýhun River in 1035, they settled near Täkgala. They informed Soltan Mesut of their intentions in a letter. In it they demanded that Soltan Mesut grant them for settlement the Nusaý and Paraw provinces, where they would put their animals out to pasture. They stated that they could suppress the insurrections likely to happen in the corridor from the Balkan Dagi, Dehistan, and Ürgenç frontiers to the banks of the Jeýhun River.

Soltan Mesut, who did not accept their offer, fought with the Seljuks near Täkgala in 1038. Soon after, in 1040, there was another battle near Sarahs on the Daňdanakan Plain. By way of war the Seljuks gained the things they had not been able to attain peacefully, and laid the foundations of the Great Seljuks’ State.

This victory made the fatherland their property forever. After the war, they summoned a council and declared their independence. Togrul Beg received the title of ‘Soltan’. They made the city of Rey their capital (1040-1063). Çagry Beg