Solomon is dead. The people come to crown his son Rechavam (Rehoboam) and ask for a tax break.
Rechavam takes bad advice and responds to the people in an imperious, disdainful manner.
In response, the northern tribes revolt and split from Rehoboam's kingdom, forming their own State and appointing Yerovam (Jeroboam) as king.
This is the moment that split the kingdom, never to be reunited.