When a man has acquired new wife, he receives a special dispensation from having to go out to battle for the Lord for one year. Yahweh directs him to use that year to "cheer up" his new bride.
"When a man hath taken a new wife, he shall not go out to war, neither shall he be charged with any business: but he shall be free at home one year, and shall cheer up his wife which he hath taken." Deuteronomy 24:5 (KJV)
Not sure what "charged with any business" other than some contextual connection to military service.
This rule seems a sensible one that supports marriage. It also provides incentive, however, for avoiding service. For those who fear foreign battles more than domestic ones, marriage becomes a convenience "out" for them. Moreover, since the Bible condones polygamy, a wealthy man can acquire additional wives repeatedly in order to avoid participating in warfare.
Scenes of domestic warfare
Scenes for foreign warfare