John Gills Exposition of the Bible Commentary - Deuteronomy 20:10
When thou comest nigh unto a city to fight against it ,.... This is to be understood of an arbitrary war, as Jarchi observes; which they engaged in of themselves, or were provoked to by their enemies; which was their own choice, and according to their own will and pleasure; and their conduct towards their enemies in it was different from that in a war with the seven nations, commanded by the Lord, and distinguished from it, Deuteronomy 20:15 . then proclaim peace unto it ; that is,... read more
Matthew Henry's Complete Commentary - Deuteronomy 20:10-20
They are here directed what method to take in dealing with the cities (these only are mentioned, Deut. 20:10; but doubtless the armies in the field, and the nations they had occasion to deal with, are likewise intended) upon which they made war. They must not make a descent upon any of their neighbours till they had first given them fair notice, by a public manifesto, or remonstrance, stating the ground of their quarrel with them. In dealing with the worst of enemies, the laws of justice and... read more