Battle of Artemisium is located in Greece

The Battle of Artemisium, or Battle of Artemision, was a series of naval engagements over three days during the second Persian invasion of Greece. The battle took place simultaneously with the more famous land battle at Thermopylae, in August or September 480 BC, off the coast of Euboea and was fought between an alliance of Greek city-states, including Sparta, Athens, Corinth and others, and the Persian Empire of Xerxes I.

• http://en.wikipedia.org/wiki/Battle of Artemisium