A Wistful Look Back

Deuteronomy 21
10 When thou goest forth to war against thine enemies, and the LORD thy God hath delivered them into thine hands, and thou hast taken them captive,
11 And seest among the captives a beautiful woman, and hast a desire unto her, that thou wouldest have her to thy wife;
12 Then thou shalt bring her home to thine house, and she shall shave her head, and pare her nails;
13 And she shall put the raiment of her captivity from off her, and shall remain in thine house, and bewail her father and her mother a full month: and after that thou shalt go in unto her, and be her husband, and she shall be thy wife.
14 And it shall be, if thou have no delight in her, then thou shalt let her go whither she will; but thou shalt not sell her at all for money, thou shalt not make merchandise of her, because thou hast humbled her.

From John Gill's Exposition Of The Entire Bible:
The plain meaning is, that when a Jewish soldier was passionately in love with a captive, and was desirous of making her his wife, he was to take her home to his house, where she was to remain, to see whether his passion of love would subside, or the woman become a proselyte, or however till certain rites were observed, and then he was permitted to marry her:

A Wistful Look Back
This passage is about proper behavior for Hebrew soldiers. My initial reaction to this passage was a question. Where is the edification? Two other questions came to mind. Does every single Bible passage have a message for us? What message does this one have?

Even with John Gill's help, I have no answers today.

I did receive an odd blessing from this passage. I was an American soldier in a foreign country - quite a few years ago. And, studying this passage did give me the opportunity to look back - wistfully - on my overseas experiences.