While Saul was king, the people of Reuben went to war against the Hagrites. They won the battle over them. Then they lived in the houses of the Hagrites. The people of Reuben lived in the entire area east of Gilead.
He got the Ammonites and Amalekites to join him. All of them came and attacked Israel. They captured Jericho. Jericho was also known as The City of Palm Trees.