John Gills Exposition of the Bible Commentary - Deuteronomy 20:17
But thou shalt utterly destroy them ,.... Men, women, and children: some think this is to be understood only of such cities which did not accept of terms of peace; for they are of opinion that Joshua made proclamation of peace to all the cities of Canaan; which being not complied with, he destroyed them as they fell into his hands; and they suppose that the Gibeonites had not heard of such a proclamation, and therefore were spared; and it is certain that there were many who were suffered to... 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