Philip of Macedon began to reign in 359 B.C. When he was sixteen years of age he was taken by Pelopidas as a hostage to Thebes. Here he stayed for three years, reading Greek literature and learning to love it, studying Greek art and learning to admire it. The craft of war he gained from the great Theban general Epaminondas.

When Philip went back to Macedon as king, he trained his army in the movements he had first seen used by the Theban troops under their famous general.

At this time a war called the Sacred War was going on in Greece.

Delphi, where the temple of Apollo stood, had been seized by the Phocians, who were led by a bold commander named Philomelus. The home of the Phocians was near Mount Parnassus.

In the temple vast treasures had been stored; these, said Philomelus, should be safe as of old. But when he fortified the city and brought a large army of soldiers to guard it, the other Greek states said it was time to interfere—that Delphi must be taken from the Phocians.

Philomelus at once resolved to increase his army, but he had no money to pay more soldiers. The Phocians had already spent all that they possessed on the war, and the citizens of Delphi had been so heavily taxed that they could give no more.

Money Philomelus must have! So he began to borrow from the treasures of the temple, which he had promised should be untouched. As the war went on he took more gold, more of the sacred treasures, none of which he was able to replace.

When the Thebans and their allies met Philomelus, he and his hired troops were soon put to flight. Philomelus fled alone to the top of a precipice, pursued by the enemy. He must either leap into the awful abyss or be captured by the angry soldiers. In a moment he had made his choice, and when the Thebans reached the spot where he had been seen but a second before, he was no longer there.

But other leaders replaced Philomelus, and they too rifled the temple of Apollo.

At length the Phocians grew so bold that they determined to attack Philip of Macedon who had invaded Thessaly, and drive him from Greek territory. They forced the king to return to Macedon, but he soon came back with a large army and the Phocians retreated to the famous pass of Thermopylae. They hoped that Athens would help them to hold the pass against Philip, but in spite of the Philippics of Demosthenes, she did nothing.