Peloponnesian War Ancient Greece : Facts, History, Summary, Timeline and Information
The Peloponnesian War began in 431 BCE and ended in 401 BCE.
It began because Sparta was concerned by how strong Athens had become.
Athens made alliances with city states in the Peloponnesian Peninsula to keep shipping lanes open for trade. Thus, surrounding Sparta and raising suspicions among the Spartans on Athens true intentions. War broke out. Sparta won the war. Therefore, Sparta took control of the Ancient Greek empire.
Sparta was not able to govern such a large territory and therefore could not maintain power.
Local conflicts and rebellions followed resulting in a decline of Greek political influence as well as economic decay.