Thematic Bible: David defeats an army and the ammonites at

And they hired thirty two thousand chariots, and the king of Maacah and his people, which came and pitched before Medeba. And the children of Ammon gathered themselves together from their cities and went out to battle. And as soon as David heard of it, he sent Joab with all the host of strong men. And the children of Ammon came out and put them in array to battle before the gate of the city. And the kings that were come kept them by themselves in the field. read more.
When Joab saw that the front of the battle was before him and after, he chose out of all the youth of Israel and put them in array against the Syrians. And the rest of the people he delivered unto Abishai his brother, that they should put themselves in array against the children of Ammon, and said, "If the Syrians be too strong for me, succor me, and if the children of Ammon be too good for thee, I will help thee. Pluck up thine heart and let us play the men for our people's sake, and for the cities of our God, and the LORD to do what seemeth him best." And Joab and the people that were with him drew nigh to the Syrians, to fight, and they fled before him. And when the children of Ammon saw that the Syrians were fled, they ran away likewise, from Abishai his brother and gat them into the city. And Joab came to Jerusalem.