I realize that when the torah discusses אשת יפת תואר it specifies
כִּי-תֵצֵא לַמִּלְחָמָה, עַל-אֹיְבֶיךָ (Devarim 21:10)
But I would still like to know if the halacha of אשת יפת תואר could theoretically apply to a Jewish woman. Meaning either during an internal civil war or where there is a Jewish woman, married to a Jewish man who are living among, and aligned with a non-Jewish national enemy. In any of those instances would a soldier be permitted to take that Jewish woman under the law of אשת יפת תואר?