The river banks were occupied by Chinese, Kalmyks, and Mongols until the Russians arrived in the late 16th century. The Russian conquest of the Irtysh basin was completed by the early 19th century.
North Korea
The last region of the wrld to be occupied was South America
The last region of the world to be occupied by early humans was the Americas, with evidence suggesting human presence as early as 15,000-20,000 years ago. This migration is thought to have occurred via the Bering Land Bridge, connecting Asia and North America during the last Ice Age.
early 19th century
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early 16th century to early 17th century
I am pretty sure that it is the early 20th century
Science and theory in the early 20th century?.
If this helps, It stood from the early 13th century to the early 18th century.
Korea.
By very careful scientific recording of sites once occupied by early people.