I Am as You Are, My People Is Your People, My Horses as Your Horses

In 1 Kings 22, Ahab asks Jhoshaphat to go with him in battle against Moab. The king of Edom is a vassal of Judah and doesn't have any kind of independent power. He has to swear all his allegiance to the king of Judah. They march through an arid region where there's no water for their army or animals. Josephat says he wants to talk to Yahweh's prophet before going to battle.