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Specialization of labor is the division of special tasks and roles. They are divided, so everyone has a different job to do. In most Ancient American civilizations, specialization of labor was important to help keep the civilization running. Division of labor were in all civilizations.
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Spain has been in many wars and has used many blockades You need to be more specific on the date and the specific war with the countries involved.
The Battle of Antietam is best known because c)it was the bloodiest battle of the Civil War. It totaled 22,717 losses ( as well as wounded and missing) and this is the two sides combined (both Confederate and Union soldiers). It was also the first major battle if the Civil War that took place on Union soil. The battle took place on September 17th, 1862.
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The two Mesopotamian inventions considered most important are writing and the wheel
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