King Baasha of Israel attacked Judah and established Ramah as a military outpost to prevent anyone from leaving or entering the land of King Asa of Judah.

So do this: Dismiss the kings from their command, and replace them with military commanders.

The rest of the events of Jehoshaphat's reign, including his successes and military exploits, are recorded in the scroll called the Annals of the Kings of Judah.