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   construction      effective      empire      fortification      infiltrating      power      prevent      sometimes      through      uniting   
The Great Wall of China is one of the most amazing projects in world history. Extending some 3,900 miles northern China, work on this gigantic continued for nearly 2,000 years. The first part of the wall was ordered built by Emperor Qin Shi Huang. The wall was built for the purposes of the Warring States into the single of China, to invaders such as the Mongols from China, and, to show the of the emperor. The Great Wall never proved in defense and is called "The Longest Cemetery on Earth" because so many people died during its construction.