¿Cual era la importancia que tenian los rlos Eufrates y Tigris para los sumerios?

The Euphrates River is one of the most important rivers in the world. Along with the Tigris, it provided much of the water that supported the development of ancient Mesopotamian culture. The Tigris Euphrates valley was the birthplace of the ancient civilizations of Assyria, Babylonian, and Sumer. El río Éufrates es uno de los ríos más importantes del mundo. Junto con el Tigris, proporcionó gran parte del agua que apoyó el desarrollo de la antigua cultura mesopotámica.El valle del Tigris Eufrates fue el lugar de nacimiento de las antiguas civilizaciones de Asiria, Babilonia y Sumer.

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european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.