Answer :

It was Thucydides who wrote perhaps the most famous and long-lasting history of the Peloponnesian War, which took place between the great kingdoms of Athens and Sparta.
Thucydides wrote a history of the war between Athens and Sparta. 

He was a great classical Greek antiquarian and founder of the story of the Peloponnesian fighting, describes the 5th era BC conflict amidst Sparta and Athens to the time, 411 BC.