“Baasha son of Ahijah, of the house of Issachar, conspired against King Nadab. Baasha struck him down at Gibbethon, which belonged to the Philistines. Nadab and all Israel were laying siege to Gibbethon. So Baasha killed him in the third year of King Asa of Judah. Baasha succeeded him. As soon as he was king, he killed all the house of Jeroboam. He left to the house of Jeroboam not one that breathed. He destroyed it, according to the word of Yahweh that he spoke by his servant Ahijah the Shilonite. This was because of the sins of Jeroboam that he committed and those that he made Israel commit. This provoked the anger of Yahweh, the God of Israel.”
The reason that King Nadab had such a short reign was due to Baasha who killed him and took over his kingdom. This is the first of what might be many assassinations. Whenever anyone has a short reign, we might look for an assassination. This killing is put in terms of a religious revolution against Jeroboam and his family. They had provoked the anger of Yahweh. Yahweh is always called the God of Israel, and not the God of Judah. Is this Baasha the son of the prophet Ahijah who had spoken to Jeroboam and his wife in chapters 11 and 14? Certainly Baasha was fulfilling the prophecy of Ahijah the Shilonite, but is he the same Ahijah from Issachar also? It is hard to be sure. Besides there are at least 9 people in the biblical literature with this same name.