The khan had even allowed the pope to introduce Christianity to the Tartar territories bordering on the Black Sea.

Tchanibek, the oldest son of Usbeck, upon the death of his father, assassinated his brothers, and thus attained the supreme authority.

He was a zealous Mohammedan, and commenced his reign by commanding all the princes of the principalities of Russia to hasten to the horde and prostrate themselves, in token of homage, before his throne.

The least delay would subject the offender to confiscation and death.

Simeon was one of the first to do homage to the new khan.