Don nu Uriang Sea

Outer Mongolia originally had 1.8 million square kilometers, so why is there only more than 1.5 million left now?
Outer Mongolia Don nu Uriang Sea Republic of Tuva Qing Dynasty History of Mongolia
01-16
This territory, which had been in constant strife with China, was eventually taken away by this country
Don nu Uriang Sea Li Tang Qing Dynasty All broadcast Yuan Li Shimin
01-11
A piece of land that has been lost for a hundred years is slowly eroded by neighboring countries, and a nation is also taken along
Tuva Outer Mongolia Don nu Uriang Sea Qing Dynasty Russia_History
01-05
How much territory did China lose during the Republic of China?
republic territory Don nu Uriang Sea
01-05
In modern northwest china, how much land has been lost?
Northwest Territories History of Tsarist Russia History of Mongolia Don nu Uriang Sea Qing Dynasty borderland
12-18
Why is Mongolia 300,000 square kilometers less?
History of Mongolia Outer Mongolia Don nu Uriang Sea Soviet_History History of Tsarist Russia
12-17