Instructions for Future Wars - Deuteronomy 20 The instructions in this chapter have reference to the wars which Israel might wage in future against non-Canaanitish nations (Deu 20:15.), and enjoin it as a duty upon the people of God to spare as much as possible the lives of their own soldiers and also of their enemies. All wars against their enemies, even though they were superior to them in resources, were to be entered upon by them without fear in reliance upon the might of their God; and they were therefore to exempt from military service not only those who had just entered into new social relations, and had not enjoyed the pleasures of them, but also the timid and fainthearted (Deu 20:1-9). Moreover, whenever they besieged hostile towns, they were to offer peace to their enemies, excepting only the Canaanites; and even if it were not accepted, they were to let the defenceless (viz., women and children) live, and not to destroy the fruit-trees before the fortifications (Deu 20:10-20).