Great Wall, Juyongguan section #
![Great Wall, Juyongguan section Great Wall, Juyongguan section](/attach/Geography/Asia/China/Pictures/Factbook_Pictures/390ch/scaled-675x800-390ch.jpg)
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The Manchus conquered the Empire in the mid-17th century and established the Qing Dynasty; they added so much more territory to the Empire beyond the Great Wall that the structure was no longer needed to protect the Empire from outside invaders.