“In the thirty-eighth year of King Azariah of Judah, King Zechariah son of King Jeroboam reigned over Israel in Samaria six months. He did what was evil in the sight of Yahweh, as his ancestors had done. He did not depart from the sins of King Jeroboam son of Nebat, which caused Israel to sin. Shallum son of Jabesh conspired against him. He struck him down in public and killed him. King Shallum reigned in his place. Now the rest of the deeds of King Zechariah are written in the Book of the Annals of the Kings of Israel. This was the promise of Yahweh which he gave to King Jehu. ‘Your sons shall sit upon the throne of Israel to the fourth generation.’ So it happened.”
The son of King Jeroboam II was King Zechariah. Meanwhile King Azariah was still in Judah. However, King Zechariah only lasted 6 months. Like the other kings before him, he did what was evil in the sight of Yahweh. He committed sins like King Jeroboam I. However, Shallum killed him in a public place. Shallum was a common name and there were over 15 people in the biblical literature with this name. This King Shallum only lasted a month until he was killed. It sounds like there were a series of revolts and counter revolts in Israel at this time. If you want more information about the short reign of King Zechariah, check with the lost “Book of the Annals of the Kings of Israel.” In case you did not notice, the death of King Zechariah was part of the punishment to King Jehu. Yahweh had said to King Jehu in chapter 10 of this book his descendents as king would only have 4 generations. Thus it lasted through these 4 kings, King Jehoahaz, King Joash, King Jeroboam II, and then King Zechariah.