The Wars of the Delian League (477–449 BCE) were a series of campaigns fought between the Delian League of Athens and her allies (and later subjects), and the Achaemenid Empire of Persia. These conflicts represent a continuation of the Greco-Persian Wars, after the Ionian Revolt and the first and second Persian invasions of Greece.

Throughout the 470s BCE, the Delian League campaigned in Thrace and the Aegean to remove the remaining Persian garrisons from the region, primarily under the command of the Athenian politician Cimon. In the early part of the next decade, Cimon began campaigning in Asia Minor, seeking to strengthen the Greek position there. At the Battle of the Eurymedon in Pamphylia, the Athenians and allied fleet achieved a stunning double victory, destroying a Persian fleet and then landing the ships' marines to attack and rout the Persian army. After this battle, the Persians took an essentially passive role in the conflict, anxious not to risk battle where possible.