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
Battle of Himera (480 BC) the expense of native Sicilians and other Greek cities during 505–480 BC, with the Dorian city of Gela being the most successful. Cleander (505–498 BC) and his brother Hippocrates (498–491) of Gela successfully took over both Ionian and Dorian Greek territory, and by 490 BC, Zankle, Leontini, Catana, Naxos, besides neighboring Sicel lands and Camarina had fallen to Gela. Gelo, successor of Hippocrates, captured Syracuse and made the city his capital. By using ethnic cleansing, deportation and enslavement, Gelo transformed the former Ionian cities into Dorian ones and made Syracuse the dominant power in Sicily. Meanwhile, Akragas, another Doric city,