Thematic Bible: Erect a monument to signify the unity of the tribes east of the jordan river with the tribes west of the river

And when they came unto the borders of the Jordan, which is in the land of Canaan, the sons of Reuben and the sons of Gad and the half tribe of Manasseh built an altar there next to the Jordan, a great altar to look upon. And the sons of Israel heard it said, Behold, the sons of Reuben and the sons of Gad and the half tribe of Manasseh have built an altar over against the land of Canaan, in the borders of the Jordan, at the passage of the sons of Israel. And when the sons of Israel heard of it, the whole congregation of the sons of Israel gathered themselves together at Shiloh, to go up to war against them. read more.
And the sons of Israel sent unto the sons of Reuben and to the sons of Gad and to the half tribe of Manasseh into the land of Gilead, Phinehas, the son of Eleazar the priest, and with him ten princes, of each chief house a prince throughout all the tribes of Israel; and each one was the head of the house of their fathers among the thousands of Israel.