this is very easy Sparta
In ancient times, Sparta was the leading rival of Athens
It changed over time - Sparta, Athens, Thebes.
The chief rival of Sparta in ancient Greece was Athens. The two city-states represented contrasting cultures and political systems, with Sparta being a militaristic oligarchy and Athens a democratic center of arts and philosophy. Their competition culminated in the Peloponnesian War (431-404 BCE), which ultimately led to Athens's defeat and a brief period of Spartan dominance in Greece.
Athens
militaristic.^ that answer is wrong
It changed over time - Sparta, Athens, Thebes.
Greece
Troy
Athens had become an intellectual center. Sparta was the warriors of Greece.
They all were - a matter of survival as they constantly fought each other. Sparta and Athens led opposing leagues.
Corinth, Thebes, Sparta.
Sparta and Athens vied for supremacy .