13 And the people of Ammon departed out of the land of Jershon, and came over into the land of Melek, and gave place in the land of Jershon for the armies of the Nephites, that they might contend with the armies of the Lamanites and the armies of the Zoramites; and thus commenced a war betwixt the Lamanites and the Nephites, in the eighteenth year of the reign of the judges; and an ^aaccount shall be given of their wars hereafter.