The hidden history of Tartary and the resetting of human memory

Tartary or Great Tartary would be a lost civilization, a powerful and vast empire that occupied all of northern Asia until approximately 1775.

It is like an ancient World Order, known as “the largest country in the world.” It extends from the territory of the Caspian Sea and the Ural Mountains to the Pacific coast.
Tartary will disintegrate after several disasters and will also be subjected to repression by the global elite. One of those disasters could be the infamous and mysterious Great Mud Flood. The purpose was to hide the cities and evidence of their empire (from the Old World Order to the New World Order).
In history books this country appears occupying all of Siberia, it will not be a lost civilization (completely), but there will be some important aspects that are said to have been suppressed, for example, imperialism and its influence in Europe and Asia. Tartary appears on several maps and official publications prior to the 19th century, but it was

then he started to disappear from these things.
According to new researchers, the country will also be very advanced (unique), with clean and free technology. Some examples could be mysterious photographs with old technology.
Tartary is a noble ancient civilization. The alternative history says that it was infiltrated and destroyed by the world elite (or another set of empires). The reason is the ambition to dominate large territories and steal and manage the scientific and technological knowledge they contain. This disintegration should have taken place in medieval times.