[32] [cap.6] And of the assertion that the being compelled to perform services to others is not of itself an indication of slavery, there is a most clear proof in what occurs in war; for one can behold men engaged in military expeditions, all acting by their own means, and not only carrying complete armour, but being also loaded like beasts of burden with everything required for their necessary wants, and going out to fetch water, and fuel, and fodder for the cattle.