When Joab saw that there was a battle line in front of him and another behind him, he chose some men out of all the elite troops of Israel and lined up in battle formation to engage the Arameans.

When this was reported to David, he gathered all Israel and crossed the Jordan. He came up to the Arameans and lined up in battle formation against them. When David lined up to engage them in battle, they fought against him.

From the Simeonites: 7,100 brave warriors ready for war.