First tell us, at what point in history.
egypt
When Alexander entered Egypt, he was welcomed by the Egyptians and was regarded as a liberator from Persian rule. He was proclaimed the new "master of the Universe" and the son of the god Amun. He founded the city of Alexandria of Egypt, which later became the most important city on Egypt. He then left to fight the Persian emperor in Mesopotamia (Iraq).
Depends what you mean by liberate. He did liberate it from Persian rule and many native Egyptians thought he would be a benevolent ruler so they welcomed him when he arrived. But Egypt was still a conquered nation after Alexander came and it would not regain its independence untill many centuries later.
Since Egypt is a dry area, flooding was good so that their crops can get water
At the time, Egypt was part of the Persian Empire, but Alexander conquered it separately before turning toward Persia Major. For one thing, Egypt was revolting against Persia and welcomed Alexander as a liberator. Plus, Alexander used the wealth of Egypt to finance the campaign against Persia.
When Alexander went into Egypt, the Egyptians considered him a liberator. While he stayed in Egypt, he founded the city of Alexandria, which in the future would become a prosperous capital city.
After the Pharaoh died, and the new Pharaoh took over, they were enslaved.
His publication of the newspaper the liberator
William Lloyd Garrison's anti-slavery newspaper was called The Liberator.
The Liberator was found in 1831 in Boston.`
the irish liberator was Daniel O'Connell
The ISBN of Conan the Liberator is 0553127063.