So God raised up opponents (11.14ff) and the seeds of a split in the kingdom after Solomon's death. Jeroboam, son of Nebat, was a trusted leader from the tribe of Ephraim. The prophet Ahijah told him that the kingdom would be split after Solomon's death and he would be king over ten of the twelve tribes - the northern kingdom of Israel. The Lord made a promise to Jeroboam too - "If you do whatever I command you and walk in my ways and do what is right in my eyes by keeping my statutes and commands, as David my servant did, I will be with you" (v.38).
After Solomon's death, the northern tribes rebelled against his son, Rehoboam, and made Jeroboam their king (12.20). Jeroboam was afraid that, if the people went up to Jerusalem to make sacrifices to the Lord, they might be drawn back to allegiance to Rehoboam (vv.26,27). So he made two golden calves, setting one up at Bethel in the south and one at Dan in the north, and said, "Here are your gods, O Israel, who brought you up out of Egypt" (v.28 - recall Ex.32.4). He built shrines on the high places and appointed priests who offered sacrifices to the golden calves. So his reign is noted for the evil into which he led Israel (note 14.9,16; 15.26,30,34; 16.19,26).