Nadab son of Jeroboam became king over Israel in the second year of Asa's rule in Judah. He was king of Israel two years.
He was openly evil before God - he followed in the footsteps of his father who both sinned and made Israel sin.
Baasha son of Ahijah of the tribe of Issachar ganged up on him and attacked him at the Philistine town of Gibbethon while Nadab and the Israelites were doing battle there.
Baasha killed Nadab in the third year of Asa king of Judah and became Israel's next king.
As soon as he was king he killed everyone in Jeroboam's family. There wasn't a living soul left to the name of Jeroboam; Baasha wiped them out totally, just as God's servant Ahijah of Shiloh had prophesied
- punishment for Jeroboam's sins and for making Israel sin, for making the God of Israel thoroughly angry.
The rest of Nadab's life, everything else he did, is written in The Chronicles of the Kings of Israel.
There was continuous war between Asa and Baasha king of Israel.