Settlement of the territory that is currentlybelongs to the inhabitants of the Republic of Tatarstan and the Chuvash Republic, began about 100,000 years ago, in the Paleolithic era. At the end of the 9th century and at the beginning of the 10th century, the first feudal state emerged here - Volga Bulgaria. For quite a long time, it was the only developed state in the territory of the extreme East of Europe. Presumably, the Bulgars were the earliest Turkic group, which in the process of the Great Migration of Peoples was among the advanced to Europe.
The highest peak of the Volga Bulgaria reached inthe reign of Emir Gabdulla Chelbir. During this period, the Bulgars were quite strong in the art of war. This confirms the fact that the Volga Bulgars are the only people who were able to defeat the troops of Genghis Khan in 1223. After that, the Mongols for 13 years unsuccessfully stormed the Bulgarian state. Only in 1229, having collected all their forces at the Yaik (Ural) River, the Mongols were able to break the Bulgars and the Polovtsy and began to rapidly move through the territory of the state, and in 1936 it was completely destroyed. Part of the Bulgars fled and found protection from the Grand Prince of Vladimir.
Already in 1240, the Bulgarian state entered intocomposition of the Golden Horde. For a long time there were mass uprisings of the Bulgars. According to Khudyakov, MG, the plunder of the capital, the city of Bolgar, and the relocation of the cultural and political center to Kazan put an end to the hopes of returning the former state. Kazan Khanate is now firmly established in these lands. The remaining indigenous people had to adapt to the new authorities. Gradually, the creation of mixed families of Bulgars-Tatars, however, all newborn children were considered Tatars. There was, so to say, the “eradication” of such a nationality as the Bulgars, and the appearance of a new one — the Volga Tatars.
As for the Bulgarian language, it’s justhas died. Many scientists tried to find in the modern Tatar language at least a few words close to the Bulgar origin. However, it is necessary to take into account another nationality - the Chuvash. If you remember, this is exactly the part of the Turkic group that did not accept Islam and separated. It is they who speak the archaic Turkic language, which is not similar to any other language. And when comparing the ancient chronicles of the Volga Bulgars and the Chuvash language, one can find many identical words. In a word, the Chuvash language is as close as possible to the Bulgarian.