15 This is how you are to treat all the cities that are at a distance from you and do not belong to the nations nearby.

Read Deuteronomy 20:15 Using Other Translations

Thus shalt thou do unto all the cities which are very far off from thee, which are not of the cities of these nations.
Thus you shall do to all the cities that are very far from you, which are not cities of the nations here.
“But these instructions apply only to distant towns, not to the towns of the nations in the land you will enter.