That to insure victory in battle you must inspire your men with confidence in one another and in you.
To insure an army being victorious in battle you must inspire it with the conviction that it is certain to prevail. The causes which give it this confidence are its being well armed and disciplined, and the soldiers knowing one another. These conditions are only to be found united in soldiers born and bred in the same country.
It is likewise essential that the army should think so well of its captain as to trust implicitly to his prudence; which it will always do if it see him careful of its welfare, attentive to discipline, brave in battle, and otherwise supporting well and honourably the dignity of his position. These conditions he fulfils when, while punishing faults, he does not needlessly harass his men, keeps his word with them, shows them that the path to victory is easy, and conceals from them, or makes light of things which seen from a distance might appear to threaten danger. The observance of these precautions will give an army great confidence, and such confidence leads to victory.
This confidence the Romans were wont to inspire in the minds of their soldiers by the aid of religion; and accordingly their consuls were appointed, their armies were enrolled, their soldiers marched forth, and their battles were begun, only when the auguries and auspices were favourable; and without attending to all these observances no prudent captain would ever engage in combat; knowing that unless his soldiers were first assured that the gods were on their side, he might readily suffer defeat. But if any consul or other leader ever joined battle contrary to the auspices, the Romans would punish him, as they did Claudius Pulcher.