Which river system the worlds earliest known civilization develop

The river system that helped the world's earliest known civilization to develop was Mesopotamia.

Explanation:

Mesopotamia is the name for the historic region lying between the Tigris and the Euphrates in the northeast of the Middle East. The historic nucleus of the territory is roughly equivalent to central Iraq today, but the name is also used to designate an area that includes Iraq, eastern Syria, parts of southeastern Turkey and southwestern Iran. It forms the eastern end of the Fertile Crescent and is known as the cradle of civilization. The land between the two rivers and their banks is extremely fertile because it is alluvial; every time those rivers overflow they are left behind by alluvium.

The first people to capitalize on this were the Sumerians, who settled in Mesopotamia around 4,000 BC to cultivate the fertile land and grow crops. They founded one of the first civilizations in world history that flourished in the city-states of Ur, Kish, Uruk and other sites.

just need the points

explanation:

alliances in ww1 were different from ww2 because the entente in ww1 made up of serbia,russia,france,britan,japan and italy later america  and all allied in a sort of balance of power and too keep germany,austria-hungary,and the ottomans down. russia allied the serbians in order to exert its influence in the balkans while france allied the russians because france was still in dismay and insulted after the defeat to the germans during the unification of germany and britian allied the belgians after the germans invasion of belgium.in ww2 the alliances were in a preemptive attempt to deter any further wars into happening while germany and italy allied since they were insulted and humiliated after the previous war while also sharing a similar ideology of facsim along with japan which all 3 had a want for world domination and agreed to assist one another in the endevours 

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