Jeroboam's son Nadab became king of Israel in the second year of Judah's King Asa. He ruled over Israel for two years.
References for 1 Kings 15:25
He did evil in the LORD's eyes by walking in the way of his father Jeroboam and the sin Jeroboam had caused Israel to commit.
Baasha, Ahijah's son from the house of Issachar, plotted against him and attacked him at Gibbethon, which belonged to the Philistines. Nadab and all Israel were laying siege against Gibbethon.
Baasha killed Nadab in the third year of Judah's King Asa and ruled in Nadab's place.
When he became king, Baasha attacked the entire house of Jeroboam. He didn't allow any living person to survive in Jeroboam's family; he wiped them out according to the LORD's word spoken by the LORD's servant Ahijah of Shiloh.
This happened because of Jeroboam's sins that he committed and that he caused Israel to commit, and because he angered the LORD, Israel's God.
The rest of Nadab's deeds and all that he did, aren't they written in the official records of Israel's kings?
There was war between Asa and Israel's King Baasha throughout their lifetimes.