Looking back at the life of a leader involves recording the basic facts of his time in power. The summary of Jehoshaphat's reign gathers the central details of his kingship, including his age, the length of his rule in Jerusalem, and his mother's name [ביאור שטיינזלץ].
However, this account provides more than just a historical timeline. The emphasis on his rule reveals a deeper truth about his relationship with the nation. After witnessing his great success, the people fully embraced him and accepted his leadership with love [מצודת דוד].