Sforno on Deuteronomy 21:15/ספורנו על דברים כ״א:ט״ו

1כי תהיינה לאיש שתי נשים, after the victory in war the Torah addresses internal matters in the Jewish state. The most important ones are interpersonal relationships with wives, children, livestock, jewelry, hunting for food, building homes, tilling the soil and matters related to clothing.