That one ought not to put in Peril all his Fortune and all his Forces; and because of this the Guarding of Passes is Often Harmful

It was never judged [to be] a wise proceeding to put into peril all of one’s fortune or all of one’s forces. This may be done in many ways. One is to do as Tullus and Metius did when they committed all the fortune of their country and the virtu of so many men, as both of these had in their armies, to the virtu and fortune of three of their Citizens, which came to be only a minimum part of the forces of each of them. Nor did they see that because of this proceeding all the labors that their ancestors had endured in the establishment of the Republic in order to have it exist free a long time, and to make her Citizens defenders of their liberty, were as it were made in vain, it being in the power of so few to lose it. Which action [on the part] of those Kings could not be considered worse. This error is also almost always committed by those who (seeing the enemy) plan to hold different places and guard the passes. For almost always this decision will be damaging unless you can thus conveniently keep all your forces [there] in that difficult place. In this case such a procedure is to be taken: but being in a rugged place and not being able to keep all your forces there, the procedure is damaging. I am made to think thusly by the example of those who, when they are assaulted by a powerful enemy, and their country being surrounded by mountains and rugged places, never tried to combat the enemy in the passes and in the mountains, but have gone out to meet them in front of these, or when they did not wish to do that, have awaited him behind these mountains in easy and not-rugged places. And the reason was, as it were, as alleged before; for many men cannot be brought to the guarding of rugged places, not only because it is not possible to live there a long time, but also because being in narrow places capable of [admitting] only a few, it is not possible to sustain an enemy who comes in a large body to hurl himself at you: And it is easy for the enemy to come in large numbers, because his intention is to pass and not stop, while to him who awaits him [the enemy............