'Wars' in the Bible

Now the acts of Rehoboam, first and last, aren't they written in the histories of Shemaiah the prophet and of Iddo the seer, after the way of genealogies? There were wars between Rehoboam and Jeroboam continually.

For the eyes of Yahweh run back and forth throughout the whole earth, to show himself strong in the behalf of them whose heart is perfect toward him. Herein you have done foolishly; for from henceforth you shall have wars."

Now the rest of the acts of Jotham, and all his wars, and his ways, behold, they are written in the book of the kings of Israel and Judah.