Peloponnesian War (jan 1, 431 BC – jan 1, 404 BC)
Description:
Broke out because Athens came into conflict with allies of Sparta Corinth and Megara. Ended with the defeat of the Athenian fleet by Lysander of Sparta. Athens tried to gain control over Sicily between 415 and 413, but failed and lost part of the navy and army to Sparta, gving Sparta the upper hand.
Added to timeline:
Date:
jan 1, 431 BC
jan 1, 404 BC
~ 27 years