What does Joshua 22:1 mean?

So the tribes of Reuben, Gad, and the half-tribe of Manasseh left the rest of Israel at Shiloh in Canaan and headed home to Gilead, the land they’d received from Moses, just as the Lord had told them. Joshua 22:1 - Modern Text Bible

(These tribes return to their territory east of the Jordan, fulfilling what God had arranged through Moses.)