Answer: Spartan Society
Explanation: The population of Sparta consisted of three main groups: the Spartans, or Spartiates, who were full citizens; the Helots, or serfs/slaves; and the Perioeci, who were neither slaves nor citizens.
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They were skilled warriors who created armor and weapons.
They conquered the Etruscans and created their own public sewers.They conquered the Etruscans and created their own public sewers.
Revolution means an overthrow of a government, usually through the use of force, such as a coup d'etat. It could also mean a scientific or artistic breakthrough.