How were the inhabitants of Nile valley protected from foreign invasion?

The inhabitants of the Nile valley were protected from foreign invasion by a number of factors, including:

Geography: The Nile valley is located in a narrow strip of land between the Sahara desert and the Red Sea. This made it difficult for invaders to reach the valley, and any who did were often met with fierce resistance from the local population.

Natural barriers: The Nile itself was a major obstacle to invaders. The river was wide and fast-flowing, and it was difficult to cross without the help of boats. In addition, the Nile valley was surrounded by mountains and cliffs, which made it difficult for invaders to find a way in.

Military strength: The ancient Egyptians were a powerful military force. They had a well-trained army and navy, and they were skilled in both offensive and defensive warfare. They also had a number of powerful allies, including the Nubians and the Libyans.

Diplomacy: The ancient Egyptians were also skilled in diplomacy. They often used diplomacy to prevent wars from starting, and they were able to negotiate выгодных trade agreements with their neighbors.

These factors all contributed to the security of the Nile valley and its inhabitants. As a result, the ancient Egyptians were able to enjoy a long and prosperous civilization.