'War' in the Bible

Now you also know what Joab the son of Zeruiah [my sister] did to me, and what he did to the two commanders of the armies of Israel, to Abner the son of Ner and to Amasa the son of Jether, [both of] whom he murdered; avenging the blood of war in [a time of] peace. And he put the [innocent] blood of war [of Abner and Amasa] on his belt that was around his waist, and on his sandals on his feet.

There was also war between Rehoboam and Jeroboam continually.

There was war between Rehoboam [Abijam’s father] and Jeroboam all the days of Rehoboam’s life.

Now as for the rest of the acts of Abijam and everything that he did, are they not written in the Book of the Chronicles of the Kings of Judah? And there was war between Abijam and Jeroboam.

Now there was war between Asa and Baasha king of Israel all their days.

There was war between Asa and Baasha king of Israel all their days.

And he said, “Whether they have come out for peace or for war, take them alive.”

Aram (Syria) and Israel continued without war for three years.