Joshua sends the 2 1/2 tribes of Israel back to their land on the other side of Jordan.
While going home those 2 1/2 tribes of Israel decided to build an altar by the Jordan river.
After the rest of the Israel heard about that altar by Jordan river, they got ready for war, but in order to find out the reason for that altar, they sent a priest with ten princes of Israel.
Phinehas the priest and the 10 princes of the 10 tribes of Israel came and asked the 2 1/2 tribes about that altar.
Reubenites, Gadites, and the 1/2 of Manasseh explain the reason for that altar being built.
The 11 men approved of the explanation for the altar and when they returned back, they stopped the plans for war.
The 2 1/2 tribes named that altar Ed = (possible meaning is “A Witness”).