What was the primary purpose of the Great Wall of China during Qin Shi Huang's reign?
Defend against northern invaders
Control trade
Mark the empire's borders
Symbolize unity
Answer
The primary purpose of the Great Wall of China during Qin Shi Huang's reign was to defend against northern invaders, particularly the nomadic Xiongnu. Qin Shi Huang incorporated diverse state walls into a single Great Wall to protect his empire.
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