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the wall was made up of pebbles, reed, and wood

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the wall was made up of pebbles, reed, and wood

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those workers rammed down the earth to make the wall.

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It kept out all of the invaders from entering China from the north

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It kept out all of the invaders from entering China from the north

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more than 1 million workers died during building the great wall.

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more than 1 million workers died during building the great wall.

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people were buried in the wall when they died

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people were buried in the wall when they died

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Shi Huangdi thought that it would be a good idea to build a wall on the northern border to protect the country

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Shi Huangdi thought that it would be a good idea to build a wall on the northern border to protect the country

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When Shi Huangdi ruled he made the wall 3,000 miles

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When Shi Huangdi ruled he made the wall 3,000 miles

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Multiple dynasties ruled by emperors such as The Great Wall of the Qin Dynasty, the Han Dynasty, and the Great Wall of the Ming Dynasty all built parts of the Great Wall during their rule.

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Multiple dynasties ruled by emperors such as The Great Wall of the Qin Dynasty, the Han Dynasty, and the Great Wall of the Ming Dynasty all built parts of the Great Wall during their rule.

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The state of Chu introduced the concept of building walls for protection

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The state of Chu introduced the concept of building walls for protection

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 Signal towers or beacons were used to send military communications: beacon (fires or lanterns) during the night or smoke signals in the daytime; other methods such as raising banners, beating clappers, or firing guns were also used

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 Signal towers or beacons were used to send military communications: beacon (fires or lanterns) during the night or smoke signals in the daytime; other methods such as raising banners, beating clappers, or firing guns were also used

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The wallusually stood 21.3 feet (6.5 meters) wide at the base and 19 feet (5.8 meters) at the top

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The wallusually stood 21.3 feet (6.5 meters) wide at the base and 19 feet (5.8 meters) at the top

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On the top, on the side facing outward, stood 7-foot- (2-metre-) high crenels called duokou. On the upper part of the duokou were large openings used to watch and shoot at attackers, and on the lower part were small openings, or loopholes, through which defenders could also shoot.

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On the top, on the side facing outward, stood 7-foot- (2-metre-) high crenels called duokou. On the upper part of the duokou were large openings used to watch and shoot at attackers, and on the lower part were small openings, or loopholes, through which defenders could also shoot.

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The great wall of china is the longest man-made structure in the world

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The great wall of china is the longest man-made structure in the world

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In 1644 or the end of the Ming dynasty the building of the Great Wall of China stopped 

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In 1644 or the end of the Ming dynasty the building of the Great Wall of China stopped 

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Some dynasties didn't need the wall so they stopped building it because they weren't being invaded

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Some dynasties didn't need the wall so they stopped building it because they weren't being invaded

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The Ming dynasty finished building the wall

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The Ming dynasty finished building the wall

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the great wall is made up of several walls form multiple dynasties

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the great wall is made up of several walls form multiple dynasties

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China is repairing parts of the great wall today

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China is repairing parts of the great wall today