Mishar Yurt was a semi-autonomous principality of the Golden Horde

Golden Horde

The Golden Horde was a Mongol and later Turkicized khanate that formed the north-western sector of the Mongol Empire...

 at the border of Moscow

Moscow

Moscow is the capital, the most populous city, and the most populous federal subject of Russia. The city is a major political, economic, cultural, scientific, religious, financial, educational, and transportation centre of Russia and the continent...

, Nizhny Novgorod

Nizhny Novgorod

Nizhny Novgorod , colloquially shortened to Nizhny, is, with the population of 1,250,615, the fifth largest city in Russia, ranking after Moscow, St. Petersburg, Novosibirsk, and Yekaterinburg...

 and Ryazan

Ryazan Principality

The Grand Duchy of Ryazan existed from 1078 when it was separated from the Chernigov Principality as the provincial Murom Principality.-Prior to the invasion of Batu Khan:...

 duchies. At the epoch of Volga Bulgaria

Volga Bulgaria

Volga Bulgaria, or Volga–Kama Bolghar, is a historic Bulgar state that existed between the seventh and thirteenth centuries around the confluence of the Volga and Kama rivers in what is now Russia.-Origin:...

 those land, originally settled by Mordvins, was settled by Turkic peoples, tended to be Muslims. In 1298 Hosayen ughli Mohammad from family of Shirin founded a principality that united local Turkic and Mordvin peoples. The capital of Mishar Yurt was Mişär

Kasimov

Kasimov is a town in Ryazan Oblast, Russia, which serves as the administrative center of Kasimovsky District . The town is situated on the left bank of the Oka River...

 (in Russian chronicles Городок-Мещёрский/Gorodok-Meşçórski). In 1393 Tokhtamysh

Tokhtamysh

Tokhtamysh was the prominent khan of the White Horde, who briefly unified the White Horde and Blue Horde subdivisions of the Golden Horde into a single state. He was a descendant of Genghis Khan's eldest grandson, Orda Khan or his brother Tuqa-Timur...

 gave Mishar Yurt to Muscovy. After the victory in the battle of Suzdal

Suzdal

Suzdal is a town in Vladimir Oblast, Russia, situated northeast of Moscow, from the city of Vladimir, on the Kamenka River. Population: -History:...

 in 1445 Vasili II of Russia

Vasili II of Russia

Vasily II Vasiliyevich Tyomniy was the Grand Prince of Moscow whose long reign was plagued by the greatest civil war of Old Russian history....

 was forced to present this land to Qasim Khan

Qasim khan

Qasím Khan was the first khan of the Qasim Khanate, a Tatar khanate since 1450s. He was the son of Kazan khan Oluğ Möxämmäd....

. Another version is that Qasim Khanate

Qasim Khanate

Qasim Khanate or Kingdom of Qasim was a Tatar territorial formation , vassal of Russia, which existed from 1452 till 1681 in the territory of modern Ryazan Oblast in Russia with its capital Kasimov, in the middle stream of the Oka River...

, appeared there was created as a buffer state

Buffer state

A buffer state is a country lying between two rival or potentially hostile greater powers, which by its sheer existence is thought to prevent conflict between them. Buffer states, when authentically independent, typically pursue a neutralist foreign policy, which distinguishes them from satellite...

between Kazan and Moscow.