Expansion of Macedonia under Philip II a significant problem, blocking the main route into Greece. However, a second route into central Greece was available. In 480 BC, during the Battle of Thermopylae, the Persian king Xerxes had sent his army via a mountain track (the "Anopea") to outflank the pass. From this track, on the western side of Mount Kallidromon, another road led off and descended in Phocis. In 480 BC, a thousand Phocian troops were stationed above Thermopylae to guard the road and prevent a Persian assault on Phocis (though they notably failed to prevent the Persians using "Anopea"). However, in 339 BC, the Greeks
Ancient Corinth ships coming from Athens, Ionia, Cyprus and the Levant. Both ports had docks for the city's large navy. In 491 BC, Corinth mediated between Syracuse and Gela in Sicily. During the years 481–480 BC, the Conference at the Isthmus of Corinth (following conferences at Sparta) established the Hellenic League, which allied under the Spartans to fight the war against Persia. The city was a major participant in the Persian Wars, sending 400 soldiers to defend Thermopylae and supplying forty warships for the Battle of Salamis under Adeimantos and 5,000 hoplites with their characteristic Corinthian helmets) in the following Battle of