Such, then, had been the progress in military art when Alexander the Great was born. Like Hannibal and Frederick, Alexander owed his military training and his army to his father. Philip had been a hostage in Thebes in his youth, had studied the tactics of Epaminondas, and profited by his lessons. When he ascended the throne of Macedon, the army was but a rabble. He made and left it the most perfect machine of ancient days. He armed his phalanx with the sarissa, a pike twenty-one feet long, and held six feet from the loaded butt. The sarissas of the five front ranks protruded from three to fifteen feet beyond the line; and all were interlocked. This formed a wall of spears which nothing could penetrate. The Macedonian phalanx was perfectly drilled in a fashion much like our evolutions in column, and was distinctly the best in Greece. It was unconquered till later opposed by the greater mobility of the Roman legion. The cavalry was equally well drilled. Before Philip’s death, in all departments, from the ministry of war down, the army of Macedon was as perfect in all its details as the army of Prussia is to-day. Philip also made, and Alexander greatly improved, what was the equivalent of modern artillery. The catapult was a species of huge bow, capable of throwing pikes weighing from ten to three hundred pounds over half a mile. It could also hurl a large number of leaden bullets at each fire. It was the cannon of the ancients. The ballista was their mortar, and threw heavy stones with accurate aim to a considerable distance. It could cast flights of arrows. Alexander constructed and was always accompanied by batteries of ballistas and catapults, the essential parts of which were even more readily transported than our mountain batteries. These were not, however, commonly used in battle, but rather in the attack and defence of defiles, positions, and towns. Alexander’s first experience in a pitched battle was at Chæronea (B.C. 338), on which field Philip won his election as Autocrator, or general-in-chief, of the armies of Greece. Here, a lad of eighteen, Alexander commanded the Macedonian left wing, and defeated the hitherto invincible Theban Sacred Band by his repeated and obstinate charges at the head of the Thessalian horse. Philip had for years harbored designs of an expedition against the Persian monarchy, but did not live to carry them out. Alexander succeeded him at the age of twenty (B.C. 336). He had been educated under Aristotle. No monarch of his years was ever so well equipped as he in head and heart. Like Frederick, he was master from the start. “Though the name has changed, the king remains,” quoth he. His arms he found ready to hand, tempered in his father’s forge. But it was his own strength and skill which wielded them.