Chapter 19 of the First Book of Chronicles begins with the Ammonites honoring the late King Nahash by sending delegates to offer condolences to his son, Hanun, who had ascended to the throne. However, Hanun's advisors wrongly suspect that the Ammonite delegates are spies sent by King David. As a result, Hanun humiliates and mistreats the delegates by shaving off half of their beards and cutting their garments in half.
When David hears about this incident, he instructs his men, Joab and his army, to prepare for battle against the Ammonites. The Ammonites join forces with other nations, including mercenaries from Mesopotamia, to fight against David. Upon learning of this, David divides his army into two groups. One group, led by Joab, faces the Ammonites, while the other group, led by David himself, confronts the mercenaries.
God grants David and his forces victory in both battles. The Ammonites flee from Joab's army, and the mercenaries from Mesopotamia surrender to David. Realizing that they are no match for Israel, the defeated nations make peace with David and agree to serve him.
This chapter highlights the consequences of misunderstanding and mistreatment. It also demonstrates God's favor toward David and his ability to grant him victory in battles.