The old campaigning schedule, which consisted in ravaging the enemy’s territory for a few months, a set battle in the open country, and a withdrawal to winter quarters, was no longer observed. If the Macedonian king did not find his enemy in the field, he besieged his towns, using siege engines to bring him to terms. Summer and winter were alike used for operations when the old array of citizen amateur soldiers had given place to the professional fighters. Alexander’s victories were won not only on the battlefield, but through the quick following up of his victories; the enemies’ power of resistance was annihilated by the rapidity with which a defeated army was pursued and never allowed a chance to gather itself together again after it was beaten. These cavalry marches in the rear of a retreating enemy, or the suddenly delivered attacks on a foe preparing to resist, attacks made irrespective of mountains and deserts, were as military achievements no less remarkable than the set battles and the sieges of strongly walled cities and citadels. Supremely characteristic of Alexander’s strategy was the pursuit after the battle of Gaugamela, when numbers of horses fell on the road from exhaustion.

As a general, Alexander did great deeds and did them in an heroic style. He was a warrior distinguished by personal bravery, filled with the ardor of combat, eager to be in the thickest of the fight, and yet the physical passion of the fighter in no way dulled the acute intelligence of the general, or made him indifferent to the mastery of details in preparing for battle or in following a victory up after it had been won. He showed strategical knowledge in approaching the enemy and knew how to overcome the natural difficulties in his way. So we see him unhesitatingly marching through narrow defiles and organizing different classes of troops according to the changing conditions which confronted him. He showed high capacity in selecting his base, in looking after his communications, in providing for and provisioning his men. When all was ready, and not before, these cautious provisions gave place to the impetuous onslaught in battle and the untiring pursuit of the defeated enemy. But the duties of generalship, complicated as they were, were not allowed to interfere with the “joy of fighting.” Alexander in every fight led his cavalry in person; whenever a breach was made in a fortification he was in the first rank; whenever a town was taken he was the first to scale the wall.

He seemed instinctively to have taken in the significance of the enlarged scale on which warfare under him was conducted. He had to solve untried problems, due to the vast extent of territory he traversed, so different in every way from the restricted limits of continental Greece. The students of strategy have especially admired his originality in the systematic following up of a victory, an element in successful warfare not dreamed of by the citizen generals of Greece. In the Peloponnesian war it never occurred to the Spartans when they had defeated the Athenians to besiege Athens. But after Issus, a most decisive victory, Alexander showed the utmost resourcefulness in the long seven months’ siege of Tyre, and finally took it by storm. The same mobility of generalship is noted in India, where he did not hesitate in the face of a division of elephants, an unknown arm in warfare, to cross a river and deliver a frontal attack.

The army, which never failed to respond to the ever-developing visions and schemes of its commander, until he had carried it to the eastern limits of the known world in his career of conquest, was at the very beginning of Alexander’s career trained for any military project he might propose. It was composed of seasoned officers and men, who had proved their mettle and gained their laurels under Philip while he was bringing his army to the highest pitch of excellence. In the list of great Greek military leaders, Philip is placed by the side of Epaminondas, the Theban, the man who revolutionized the Greek art of warfare by a fine stroke of genius. It had been noted that in the Greek battles, where the phalanx had become the controlling factor, its right wing was frequently victorious in both opposing armies. This phenomenon was simply due to the fact that the Greek heavy-armed soldier carried a shield on his left arm and naturally tended to move in an oblique direction towards the right hand. The chief innovations introduced by Epaminondas were the strengthening of the left wing by increasing its depth—it was made fifty men deep—and the holding back of the right wing as the whole phalanx advanced in battle array. With the increased depth of the phalanx, the front was necessarily shortened, and in order to prevent flanking operations, Epaminondas made great use of cavalry, in protecting the flanks of his men from an encircling movement on the part of the enemy, whose phalanx, since it was not so deep (being the old shape), would stretch out on both sides beyond the lines of the Theban line. As a general, Philip accepted these new tactical principles originated by Epaminondas, and applying them to Macedonian conditions, made of the Macedonian army a wonderfully effective military machine.

Macedonia was peopled by peasants and herdsmen, and up to Philip’s time they were an untrained mass, insufficiently armed, not able to contend with the armies of the rest of Greece. There was a landed aristocracy in Macedon, forming a special warrior class, who fought as cavalry. Using these elements and adding to them Greek mercenaries, King Philip had created a military force far superior to any that Greece had ever seen before.

The Greek cavalry moved in loose formation, the horsemen wore armor, and as arms they had a shield, sword, and spear, the spear being used rather for throwing than for striking, as is the case with the modern lance, with the whole momentum of the moving mass, man and horse. The troops of the Macedonian cavalry, formed of the nobles of the land, were called the followers of the king, “Hetairoi.” They bore a shield and a spear for casting or thrusting, and a sword, and were always given a crucial position in an engagement. As contrasted with Greek cavalry generally, the Macedonians showed superior training and discipline; they moved together and behaved in a fight, not as individual warriors, but as tactical units, and were controlled in their movements by a single will. Such development of cavalry was unfamiliar to the Greek republics, which confined themselves to the technical training of the phalanx.

The Macedonian foot were the special creation of Philip, and were named by him “the followers on foot.” They fought in the ordinary phalanx formation, but closer together than was usual, and used long spears, so that several lines were enabled at once to engage in actual hand-to-hand fighting. The spear was so constructed as to weight, thickness, and length that it could reach the opposing line and yet be firmly grasped. The ordinary spear was somewhat over six feet in length, but the Macedonian phalanx depended for its success not so much on man-to-man fighting as on the irresistible impact of the whole. When it was acting on the defensive, it was virtually impenetrable. Its disadvantage was in its lack of individual initiative; the soldiers were machines rather than fighting men. It was heavy in its movements and could be thrown into disorder more easily than the older Greek phalanx with its looser formation. The élite corps, the hypaspists, were more lightly armed than the men in the phalanx, and so moved more freely. In Alexander’s battles they were the connecting link between the cavalry and heavy mass of the phalanx, which advanced slowly forward. As managed by Alexander, these various arms seem to have worked admirably together, all sharing in the activity of a general offensive movement. It should be added that Alexander was also indebted to his father for much of the advance made in the art of besieging. He constantly used siege engines, and we have noticed how much he depended on their successful employment at Tyre and Halicarnassus.

Posterity has justly selected the epithet “great” as most fitting to be coupled with Alexander’s name, and he has this honor for more than one reason. It is perhaps less contested than in the case of any other of the world’s leading personalities, Charles the Great alone excepted, for Charles, like Alexander, introduced a new age of the world’s history. Great as were the successes of Alexander, they constitute less of a claim on the personal admiration of posterity than his knightly qualities as a warrior, and the charm and impetuosity of youth. His great victories were won between the years of twenty-one and twenty-five. In the space of thirteen years there are crowded together events and achievements that would exalt the longest life of the greatest man.

His sudden and premature death did him a kind of poetic justice, because his temperament cannot be coupled consistently with the characteristics of old age or even with the middle period of man’s life. His body and his brain had been under a tremendous pressure, which even a strong constitution could not resist. It was this restive youthfulness that spurred him on to adventures which were purposeless when looked at from the point of view of the mature statesman, such as the expedition to India, an uncalculated move not to be understood except as due to the stimulus of an explorer’s curiosity and the desire to accomplish a feat unheard of before.

The impulsiveness and emotionalism of Alexander in combination with his military genius produced results unprecedented in history. His career is that of a Homeric hero on a larger stage. It is not surprising that his conquests almost defy criticism and make a personal estimate seem artificial. He did so much that it apparently makes little difference what he was, for his actions speak for themselves, and they tell their tale like a fairy story, without any need of analysis. It is obviously unfair to look for constructive statesmanship in a career so short, when almost every month was occupied with military campaigns either planned or in execution. When his life was ended, Alexander was still a young man with a fresh and vigorous intelligence, open to new impressions. It is hazardous to infer (as Grote does) that he would have spent his life in acts of military aggression or that he would have sunk to the position of an Oriental despot, little differing from the Persian kings to whose title he succeeded. It is safer to put aside these pessimistic historic prognostics of what might have been, and to recognize that Alexander, provided he kept his mental powers undulled by drink, would have remained a Greek and not become a Hun or a Vandal.