The land started at Mahanaim. The land included all of Bashan, all the land ruled by Og, king of Bashan, all the towns of Jair in Bashan. (In all, there were 60 cities.)
The land also included half of Gilead, Ashtaroth, and Edrei. (Gilead, Ashtaroth, and Edrei were the cities where king Og had lived.) All this land was given to the family of Makir son of Manasseh. Half of all those sons got this land.
So the family group of Manasseh had ten areas of land west of the Jordan River and two more areas of land, Gilead and Bashan, on the other side of the Jordan River.
Moses had given the land of Bashan to half of the Manasseh family group. Joshua gave land on the west side of the Jordan River to the other half of the Manasseh family group. Joshua blessed them and sent them home.