The main purpose of the Great Wall of China was to _____?
The main purpose of the Great Wall of China was to _____?
چین کی عظیم دیوار کا بنیادی مقصد _____ کرنا تھا؟
Explanation
The Great Wall of China was built mainly to protect against invasions from northern tribes like the Mongols.
It served as a military barrier and lookout system across China's northern frontier.