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 Thermopylae (323 BC) Battle of Thermopylae (323 BC) The Battle of Thermopylae was fought in 323 BC between the Macedonians and a coalition of armies including Athens and the Aetolian League in the pass of Thermopylae during the Lamian War. After Antipater received news of the outbreak of the war, he sent messengers to Craterus and Philotas who were in Asia with an army of over 10,000 soldiers, to come to his aid. But receiving news of the progress of the war and realizing that he couldn't wait for his reinforcements to arrive, he marched south to Thessaly with 13,000 foot soldiers and