Joab saw that there were two army groups ready to fight against him. One group was in front of him and the other group was behind him. So Joab chose some of the best soldiers of Israel. He sent them out to fight against the army of Aram.
Saul was on one side of the mountain. David and his men were on the other side of the same mountain. David was hurrying to get away from Saul. Saul and his soldiers were going around the mountain to capture David and his men.