My recommendation is that you call up the entire Israelite army from Dan to Beersheba—an army as numerous as the sand on the seashore! Once they've assembled, then you yourself lead them into battle!
Abner told David, “Let me go immediately and summon all of Israel to come together for my lord the king, so they may make an agreement with you, and that you may rule over all you would wish.” Then David sent Abner safely on his way.
All the Israelites from Dan to Beersheba, including the land of Gilead, went and gathered at Mizpah before the Lord. The assembly was united in purpose.