Sparta was temporarily the main power until overturned by Thebes three decades later.
Athens and its allies were defeated by Sparta in the Peloponnesian War.
Sparta .
Sparta led the Peloponnesian League . Athens led the Delian League .
Yes, because Sparta and Athens were once allies but then Athens turned on Sparta and Sparta responded with war.
Athens won the first Peloponnesian War but Sparta won the second war
Athens and Sparta
The city-state of Athens and its allies were defeated by Sparta in the Peloponnesian War.
Athens versus Sparta .
Athens and Sparta
The conflict between Athens and Sparta , known as the Peloponnesian War , was won by the city-state of Sparta .
. . . the Peloponnesian War .
Athens and its empire versus the Peloponnesian League led by Sparta.