5. Mose 20:4

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).

This chapter settles the militia, and establishes the laws and ordinances of war, I. Relating to the soldiers. 1. Those must be encouraged that were drawn up to battle (Deu 20:1-4). 2. Those must be dismissed and sent back again whose private affairs called for their attendance at home (Deu 20:5-7), or whose weakness and timidity unfitted them for service in the field (Deu 20:8, Deu 20:9). II. Relating to the enemies they made war with. 1. The treaties they must make with the cities that were far off (Deu 20:10-15). 2. The destruction they must make of the people into whose land they were going (Deu 20:16-18). 3. The care they must take, in besieging cities, not to destroy the fruit-trees (Deu 20:19, Deu 20:20).

20:4 He will fight for you: This promise affirms that God initiates wars, carries them out, and brings them to successful conclusion against his enemies. The purpose of war initiated by God was to eradicate hopelessly unrepentant enemies and prevent them from contaminating his people (see 1:30).