Multiple choice What was the main sea battle during the Persian War? Thermopylae Salamas Marathon Plataea Reveal answer Fill a bubble to check yourself B Correct answer Explanation The Battle of Salamis (480 BCE) was the decisive naval engagement where the Greek fleet, led by Themistocles, defeated the Persian navy in the straits near Athens. This forced Xerxes to retreat and marked the turning point in the Greco-Persian Wars.