The historical name for a region of Eastern Russia, Northeast China and Eastern Mongolia. This was never an official country or territory, just an informal name – like, “the Midwest.”
The area referred to as “Manchuria” has been occupied by both China and Russia. It comprises the extreme Eastern tip of Asia, across the Sea of Japan from the Japanese main island. North Korea extend southward from the Manchurian region.
China rejects the name “Manchuria.” Today, it has been divided up into several different provinces.