PELOPONNESIAN WAR
431 BC - 404 BC

The Peloponnesian War was fought between Athens and Sparta. Both teams had a widespread net of alliances.

Thucydides is the historian of your choice when it comes to the Peloponnesian War.

WHO WON WHO LOST?
Athens surrendered in 404 BC and the Spartans won.

BATTLES OF THE PELOPONNESIAN WAR
415 BC - 413 BC, Siege of Syracuse

And here is the map

MAP OF GREECE IN 431 BC