Philip’s first years of kingship were devoted to the discipline of his army. Hitherto most of the main battle fighting in the world had been done by footmen in formation. In the very ancient Sumerian battle-pieces we see spearmen in close order forming the main battle, just as they did in the Zulu armies of the nineteenth century; the Greek troops of Philip’s time were still fighting in that same style; the Theban phalanx was a mass of infantry holding spears, the hinder ranks thrusting their longer spears between the front-line men. Such a formation went through anything less disciplined that opposed it. Mounted archers could, of course, inflict considerable losses on such a mass of men, and accordingly, as the horse came into warfare, horsemen appeared on either side as an accessory to this main battle. The reader must remember that the horse did not come into very effective use in western war until the rise of the Assyrians, and then at first only as a chariot horse. The chariots drove full tilt at the infantry mass and tried to break it. Unless its discipline was very solid they succeeded. The Homeric fighting is chariot fighting. It is not until the last thousand years B.C. that we begin to find mounted soldiers, as distinct from charioteers, playing a part in warfare. At first they appear to have fought in a scattered fashion, each man doing his personal feats. So the Lydians fought against Cyrus. It was Philip who seems to have created charging cavalry. He caused his “companions” to drill for a massed charge. And also he strengthened his phalanx by giving the rear men longer spears than had been used hitherto, and so deepening its mass. The Macedonian phalanx was merely a more solid version of the Theban phalanx. None of these massed infantry formations was flexible enough to stand a flank or rear attack. They had very slight manœuvring power. Both Philip’s and his son’s victories followed, therefore, with variations, one general scheme of co-operation between these two arms. The phalanx advanced in the centre and held the enemy’s main body; on one wing or the other the cavalry charges swept away the enemy cavalry, and then swooped round upon the flank and rear of the enemy phalanx, the front of which the Macedonian phalanx was already smiting. The enemy main battle then broke and was massacred. As Alexander’s military experience grew, he also added a use of catapults in the field, big stone-throwing affairs, to break up the enemy infantry. Before his time catapults had been used in sieges, but never in battles. He invented “artillery preparation.”
With the weapon of his new army in his hand, Philip first turned his attention to the north of Macedonia. He carried expeditions into Illyria and as far as the Danube; he also spread his power along the coast as far as the Hellespont. He secured possession of a port, Amphipolis, and certain gold mines adjacent. After several Thracian expeditions he turned southward in good earnest. He took up the cause of the Delphic amphictyony against those sacrilegious Phocians, and so appeared as the champion of Hellenic religion.
There was a strong party of Greeks, it must be understood, a Pan-Hellenic party, in favour of the Greek headship of Philip. The chief writer of this Pan-Hellenic movement was Isocrates. Athens, on the other hand, was the head and front of the opposition to Philip, and Athens was in open sympathy with Persia, even sending emissaries to the Great King to warn him of the danger to him of a united Greece. The comings and goings of twelve years cannot be related here. In 338 B.C. the long struggle between division and Pan-Hellenism came to a decisive issue, and at the battle of Chæronea Philip inflicted a crushing defeat upon Athens and her allies. He gave Athens peace upon astonishingly generous terms; he displayed himself steadfastly resolved to propitiate and favour that implacable city; and in 338 B.C. a congress of Greek states recognized him as captain-general for the war against Persia.
He was now a man of forty-seven. It seemed as though the world lay at his feet. He had made his little country into the leading state in a great Græco-Macedonian confederacy. That unification was to be the prelude to a still greater one, the unification of the Western world with the Persian empire into one world state of all known peoples. Who can doubt he had that dream? The writings of Isocrates convince us that he had it. Who can deny that he might have realized it? He had a reasonable hope of living for perhaps another quarter century of activity. In 336 B.C. his advanced guard crossed into Asia....
But he never followed with his main force. He was assassinated.
§ 2
It is necessary now to tell something of the domestic life of King Philip. The lives of both Philip and his son were pervaded by the personality of a restless and evil woman, Olympias, the mother of Alexander.
She was the daughter of the king of Epirus, a country to the west of Macedonia, and, like Macedonia, a semi-Greek land. She met Philip, or was thrown in his way, at some religious gathering in Samothrace. Plutarch declares the marriage was a love-match, and there seems to be at least this much in the charges against Philip that, like many energetic and imaginative men, he was prone to impatient love impulses. He married her when he was already a king, and Alexander was born to him three years later.