Tartaria in North America, 1500s–1800s: What the Primary Sources Show
The "Tartarian Empire" theory holds that a vast, advanced civilization once spanned the globe, including North America, and was erased in the 1800s: its people killed or put in institutions, its grand buildings taken over, and its wealth seized. The idea grew out of Anatoly Fomenko and Gleb Nosovsky's Russian "New Chronology," which claims the American Revolution was really a war over the "American lands of the Moscow Tartary." Since about 2016 it has spread widely online through videos about old buildings, world's fairs and "mud floods."