TSK · 2 Chronicles 13:1

Abijah’s Reign over Judah In the eighteenth year of the reign of Jeroboam son of Nebat, Abijah became king over Judah.

The events of Rehoboam’s reign, from start to finish, are recorded in the Annals of Shemaiah the prophet and of Iddo the Seer that include genealogical records. There were wars between Rehoboam and Jeroboam continually.