Persia
Athens and its allies were defeated by Sparta in the Peloponnesian War.
The city-state of Athens and its allies were defeated by Sparta in the Peloponnesian War.
In 404 BCE at the end of the Peloponnesian War.
Sparta defeated Athens .
Generally, it was Athens (with its navy) versus Sparta (with its army). This was a war (from 431 to 404 BC) in which Athens and its allies were defeated by the Peloponnesian League, including Sparta.
Athens won the first Peloponnesian War but Sparta won the second war
No single city-state won the war. Sparta and its allies defeated Athens and its allies.
No city won. The Sparta alliance with Persian backing defeated the Athens alliance or empire.
. . . the Peloponnesian War .
It was stripped of its empire.
Athens and Sparta
Athens and Sparta fought in the Peloponnesian War.