Which Greek city-state sent soldiers to help Athens at the Battle of Marathon?

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Greco-Persian Wars The Battle of Salamis (480 bce), in which Greece gained an uncontested victory over the Persian fleet.

At the Battle of Marathon in 490 BCE, the city-state of Plataea sent its full levy of approximately 1,000 soldiers to assist Athens. This support was provided in accordance with an alliance formed between the two cities in 519 BCE.12