The ancient Greek city-state known for its naval power was Athens. Renowned for its strong navy, particularly during the 5th century BCE, Athens wielded significant influence over the Aegean Sea and established the Delian League, an alliance of city-states aimed at countering the Persian threat. The city's strategic location and investment in shipbuilding allowed it to dominate naval warfare. Athenian naval power played a crucial role in key battles such as the Battle of Salamis, contributing to the defeat of Persia and asserting Athens as a leading power in classical Greece, while also fostering cultural advancements during its Golden Age.