Final answer:
Sparta and Athens had several similarities, including fighting on the same side in the Peloponnesian Wars, being dominated by their military, and being Greek city-states.
Step-by-step explanation:
Sparta and Athens had several similarities:
They both fought on the same side in the Peloponnesian Wars. The Peloponnesian War was a conflict between Athens and its allies, and Sparta and its allies.
Both city-states were dominated by their military. Sparta was known for its powerful and disciplined military, while Athens had a strong navy.
Both city-states were Greek. They were two of the most important Greek city-states in the Archaic and Classical periods.