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Bridges would have been the arteries of the empire. They were multipurpose. The military could march faster across rivers and lakes. Traders and farmers used them to haul their wares into towns. Travelers and vacationers used them for a relatively smooth ride to their destination.
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Key for movement in and out of river valley civilizations,Mesopotamia benefited from the use of bridges because of the location of the Tiber and Euphrates River