Jeroboam was the new king added to the roster, meaning the house of David had to share the territory with another family.  By house, I mean his relatives, not his actual palace, silly.  Anyway, once Jeroboam became king, he did something to discourage his subjects from travelling into his rival territory in Jerusalem.  What did he do?

-Built idols for them to worship instead of God-

-Banned them from going to Jerusalem-

-Built a wall-

-Promised to do the hokey pokey-