What was the main reason ancient civilizations were established along the Nile River?

The river had many resources.

Explanation:

The Nile river had fruit trees that grew along its banks that were used as food, and about every 6 months the river flooded and when it seceded there would be a layer of silt that was perfect for farming. The river also had many fish that ancient people could catch to eat.

the only other powers were germany russia and uk and they were too busy fighting each other wearing each other down   that the us was becoming strong and they were becoming weaker