Rehoboam and Jeroboam were continually at war with each other.

which I reserve for the time of trouble, for the day of war and battle? ¹ 

Rehoboam ¹  and Jeroboam were continually at war with each other throughout Abijah’s ²  lifetime.

Now Asa and King Baasha of Israel were continually at war with each other. ¹ 

Asa and King Nadab of Israel were continually at war with each other.

There was no more war until the thirty-fifth year of Asa’s reign.

There he shattered the arrows, ¹  the shield, the sword, and the rest of the weapons of war. ²  (Selah)

He ruled for three years in Jerusalem. ¹  His mother was Michaiah, the daughter of Uriel from Gibeah. ²  There was war between Abijah and Jeroboam.

The rest of the events of Abijah’s reign, including all his accomplishments, are recorded in the scroll called the Annals of the Kings of Judah. ¹  Abijah and Jeroboam had been at war with each other.

“At that time ¹  I will make a covenant for them with the wild animals, the birds of the air, and the creatures that crawl on the ground. I will abolish ²  the warrior’s bow and sword – that is, every weapon of warfare ³  – from the land, and I will allow them to live securely.” ⁴