And if haply those who are occupied in farming, and are
 receiving a rigorous and manly teaching, are forced
 at any time to quit their lands by great armies,
 they, as men well-found in mind and in body, can
 enter the country of those who hinder them, and take
 sufficient for their support. Often in time of war
 it is safer to go armed in search of food than to
 gather it with farming implements. Moreover, husbandry helps
 to train men for corporate effort. For men are
 essential to an expedition against an enemy, and the
 cultivation of the soil demands the aid of men.