The Battle of Thermopylae, fought in 480 BCE during the Greco-Persian Wars, is best known for the valiant stand of a small Greek force led by King Leonidas of Sparta against the massive invading army of Persia. This battle epitomized heroism and sacrifice, as the Greeks, including 300 Spartans, fought fiercely against overwhelming odds. Despite their eventual defeat, the battle became a symbol of resistance and unity among the Greek city-states, inspiring future generations. It also bought time for the larger Greek forces to prepare for subsequent battles, such as the famous naval encounter at Salamis, which ultimately led to the defeat of the Persians.