The chapter begins with Reuben, the firstborn of Israel. Because he defiled his father's bed, he lost the rights of the firstborn, which passed to the sons of Joseph, while Judah became strong among his brothers and a ruler would come from him. The descendants of Reuben are then listed; they spread across Gilead and, in the days of Saul, made war on the Hagrites.
Next come the Gadites, who lived opposite them in Bashan, and their chiefs, recorded in the days of Jotham, king of Judah, and Jeroboam, king of Israel. The Reubenites, the Gadites and the half-tribe of Manasseh had brave men skilled in war. They fought the Hagrites and other peoples, cried out to God in the battle and he helped them, because they trusted in him, and they captured many animals and prisoners.
The chapter ends with a dark turn. After naming the chiefs of the half-tribe of Manasseh, brave men, the text says the tribes were unfaithful to the God of their fathers and prostituted themselves after the gods of the peoples of the land. So God stirred up the spirit of the king of Assyria, who carried the Reubenites, the Gadites and the half-tribe of Manasseh into exile.