According to the author of 1 Kings, the story is about two leaders, Asa and Baasha, who were always fighting with each other. They were like two people who couldn't get along and had many battles during the time they were in charge.
1 Kings 15:32: And there was war between Asa and Baasha king of Israel all their days.
This verse contradicts 1 Kings 15:32 by stating that the war between Asa and Baasha started earlier in their reigns rather than in Baasha's later years.
1 Kings 15:16: And there was war between Asa and Baasha king of Israel all their days.