5 And let the overseers say to the people, If there is any man who has made for himself a new house and has not gone into it, let him go back to his house, so that in the event of his death in the fight, another may not take his house for himself. 6 Or if any man has made a vine-garden without taking the first-fruits of it, let him go back to his house, so that in the event of his death in the fight, another may not be the first to make use of the fruit. 7 Or if any man is newly married and has had no sex relations with his wife, let him go back to his house, so that in the event of his death in the fight, another man may not take her. 8 And let the overseers go on to say to the people, If there is any man whose heart is feeble with fear, let him go back to his house before he makes the hearts of his countrymen feeble.
Matthew Henry's Commentary on Deuteronomy 20:5-8
Commentary on Deuteronomy 20:1-9
(Read Deuteronomy 20:1-9)
In the wars wherein Israel engaged according to the will of God, they might expect the Divine assistance. The Lord was to be their only confidence. In these respects they were types of the Christian's warfare. Those unwilling to fight, must be sent away. The unwillingness might arise from a man's outward condition. God would not be served by men forced against their will. Thy people shall be willing, Isaiah 8:12.