Your answer would be: The Abbasids
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So eastern German's could not escape to the west.<span />
Answer:
They created irrigation systems and used canals to control flooding. They also used the silt brought by the floods to help with their farming.
Answer:
The Han Dynasty in China, one of the world's great classical civilizations, because people rebelled against them. How did mountains and deserts help Chinese civilizations develop? Mountain and deserts helped the Chinese by giving the safe borders.
Explanation:
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