After Asa, Jehosaphat reigned in Judah, followed by Jehoram. Meanwhile, Ahab reigned over Israel, followed by Ahaziah, then Joram. Although Jehoshaphat was a good king, he made an ungodly alliance with Israel, marrying his son Jehoram to evil Athaliah, daughter of Ahab and Jezebel. As a result, Jehoram walked in the ways of the evil kings of Israel. We show that one example of this is that Jehoram caused Judah to change to using non-accession year dating, just like Israel. This system continued in Judah for the next 4 reigns.