Albert Barnes Commentary 1 Kings 16:5

"Now the rest of the acts of Baasha, and what he did, and his might, are they not written in the book of the chronicles of the kings of Israel?" — 1 Kings 16:5 (ASV)

The “might” of Baasha is sufficiently indicated by the successes that drove Asa to call Ben-hadad to his aid (1 Kings 15:17–21).