What does Joshua 22:9 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, their own land, which Moses had given them on the other side of the Jordan. Joshua 22:9 - Modern Text Bible

(The eastern tribes return to their allotted land, crossing back over the Jordan River to settle where Moses had assigned them.)