The excellence of this military organization, which became the primary cause of the superior political position of the Roman community, chiefly depended on the three great military principles of maintaining a reserve, of combining the close and distant modes of fighting, and of combining the offensive and the defensive.  The system of a reserve was already foreshadowed in the earlier employment of the cavalry, but it was now completely developed by the partition of the army into three divisions and the reservation of the flower of the veterans for the last and decisive shock.  While the Hellenic phalanx had developed the close, and the Oriental squadrons of horse armed with bows and light missile spears the distant, modes of fighting respectively, the Roman combination of the heavy javelin with the sword produced results similar, as has justly been remarked, to those attained in modern warfare by the introduction of bayonet-muskets; the volley of javelins prepared the way for the sword encounter, exactly in the same way as a volley of musketry now precedes a charge with the bayonet.  Lastly, the elaborate system of encampment allowed the Romans to combine the advantages of defensive and offensive war and to decline or give battle according to circumstances, and in the latter case to fight under the ramparts of their camp just as under the walls of a fortress—­the Roman, says a Roman proverb, conquers by sitting still.

Origin of the Manipular Legion

That this new military organization was in the main a Roman, or at any rate Italian, remodelling and improvement of the old Hellenic tactics of the phalanx, is plain.  If some germs of the system of reserve and of the individualizing of the smaller subdivisions of the army are found to occur among the later Greek strategists, especially Xenophon, this only shows that they felt the defectiveness of the old system, but were not well able to obviate it.  The manipular legion appears fully developed in the war with Pyrrhus; when and under what circumstances it arose, whether at once or gradually, can no longer be ascertained.  The first tactical system which the Romans encountered, fundamentally different from the earlier Italo-Hellenic system, was the Celtic sword-phalanx.  It is not impossible that the subdivision of the army and the intervals between the maniples in front were arranged with a view to resist, as they did resist, its first and only dangerous charge; and it accords with this hypothesis that Marcus Furius Camillus, the most celebrated Roman general of the Gallic epoch, is presented in various detached notices as the reformer of the Roman military system.  The further traditions associated with the Samnite and Pyrrhic wars are neither sufficiently accredited, nor can they with certainty be duly arranged;(23) although it is in itself probable that the prolonged Samnite mountain warfare exercised a lasting influence on the individual development of the Roman soldier, and that the struggle with one of the first masters of the art of war, belonging to the school of the great Alexander, effected an improvement in the technical features of the Roman military system.