I get the answer anwer is <span>North China Plain</span>
The answer is, when he turned on Stalin
<span>Political power shifted from the central government to local notables and military strongmen.
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This led to civil wars in the kingdoms that furthermore weakened the initially powerful governments. The weak central governments could also not withstand the emerging imperialistic pressures from western powers. As a result the empires crashed one by one, and parts of their territories were taken over by the major imperial powers.
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4 years, let me know if it is right.
