Here the kings represent themselves accompanied by their armies. AT: "Ahab, the king of Israel, and Jehoshaphat, the king of Judah led their armies up against" (See: [[rc://en/ta/man/translate/figs-synecdoche]])
By mentioning both "the unimportant" and "the important soldiers," the king meant all soldiers. AT: "Do not attack any of the soldiers" (See: [[rc://en/ta/man/translate/figs-merism]])