Answer: the rebuilding of the Great Wall
At that time, the Chinese citizens had to face constant threats from the barbarian that resided on the northern part of their territory.The previously built wall was not strong enough and able to be destroyed by the invaders. Ming Dynasty took the credit of rebuilding and strengthening the structure of the great wall.
According to the Canadian Museum of History, one of the primary ways geography affected early civilizations was in determining the location of settlements.<span> Since early humans needed access to water and fertile ground for agriculture, cities tended to spring up along rivers and flood plains. In addition, geographic features such as mountains frequently served as barriers and provided natural borders between civilizations</span>
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