Albert Barnes Commentary Joshua 22:1

"Then Joshua called the Reubenites, and the Gadites, and the half-tribe of Manasseh," — Joshua 22:1 (ASV)

The events of this chapter are undoubtedly recorded in their proper historical order. The auxiliary forces of the transjordanian tribes were not sent away immediately after the campaigns against the Canaanites were over. They set out from Shiloh (Joshua 22:9), where the sanctuary had been moved (Joshua 18:1) following the conquest, the settlement of the children of Judah and Joseph in their possessions, and the appointment of the Levitical cities.