Why was the great wall of china built wider at the bottom ?

to make it strong so that it does not collasp

In ancient China, the Great Wall of China was used as a military fortification, and the space between the inner and outer walls were filled in for marching and transporting supplies, hence making the Great Wall as wide as 4-5 meters (13-16 feet), which can allow 10 soldiers to walk shoulder by shoulder.

Explanation:

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