Army

King Aviyah either defaced the corpses of the Army of Yeravam by removing the noses of the dead of war, or didn't allow the corpses to be identified for three days, proof of halachah of how we positively identify corpses for purposes of remarriage or yibum of wives

leniencies in halachah for Army, gathering wood, washing hands, demai, eruv, size considered an Army, graves of soldiers

minor children of idolators, soldiers of Nebuchadnezzar Army, no world to come but no judgement either

yishuv eretz yisrael - exemption of serving in the Army due to building a house only applies to a house in Israel due to the mitzvah of developing the land of Israel