The two armies of the Ammonites and the Syrians were drawn up facing one another; the Ammonites supported by the city Rabbah behind them; the Syrians in great force, with numerous chariots able to manoeuvre in the plain in front of Medeba. If Joab advanced against either, he would have the other in his rear.
Related Commentaries of 2 Samuel 10:9
2 Samuel 10:9
9 When Joab saw that the front of the battle was against him before and behind, he chose of all the choice men of Israel, and put them in array against the Syrians: