Observe, the children of half the tribe of Manasseh are here included in this grant.
Related Commentaries of Numbers 32:33
Numbers 32:33-34
33 And Moses gave unto them, even to the children of Gad, and to the children of Reuben, and unto half the tribe of Manasseh the son of Joseph, the kingdom of Sihon king of the Amorites, and the kingdom of Og king of Bashan, the land, with the cities thereof in the coasts, even the cities of the country round about.
34 And the children of Gad built Dibon, and Ataroth, and Aroer,