Sparta was the Greek city-state that was most militaristic.
Sparta.
I think you mean the Greek city-state of Sparta.
most of the greek city-states practiced oligarchy, including sparta and athens.
All did, for survival. Sparta was exclusively devoted to it.
Athens.
The Peloponnesian League, led by Sparta, defeated the Athenian league/empire.
The city-state of Athens and its allies were defeated by Sparta in the Peloponnesian War.
No city won. The Sparta alliance with Persian backing defeated the Athens alliance or empire.
If you are referring to Sparta, the Greek city state, it never defeated the Romans. If you are referring to Spartacus, he defeated the consular armies of Lucius Gellius Publicola and Gnaeus Cornelius Lentulus Clodianus.
Yes
Sparta did not rule an empire. Sparta was a Greek city-state.
Sparta was located in the southern greek city-state known as Lacedaemon.
They were defeated by a coalition of Greek city-states led by Sparta.
Athens
Sparta.
Sparta was a Greek city-state that was a feared warrior society.