What is probably the best reason to explain why Alexander took control of the Nile Delta?

Alexander the great ruler took control of the Nile Delta. He conquered the Egypt whole for marking the initiation of Greek period. Nile river provided a vast fertile land which was the base of making a great civilization. Alexander wanted to spread his dynasty.  

Explanation:

Alexander was the son of Macedon. He was the great ruler. He took control over Egypt and the delta of Nile to mark the initiation of Greek period. Alexandria the great city the capital of Egypt was situated in the bank of Nile river. To spread his dynasty and expand his territory he took control over whole Egypt and Greece.

Nile is the longest river of the world. It has great vast fertile track on its both side which provides fertile agricultural base for the inhabitants who lived there. This was a best source of tax and tariff related to agriculture.

it was the "4. potsdam" conference that demanded the unconditional surrender of japan, since it was clear that the japanese would continue to find until the very last man otherwise.