This was the allotment for the tribe of Manasseh as Joseph’s firstborn. Gilead and Bashan were given to Machir, the firstborn of Manasseh and the father of Gilead, because he was a man of war.
“At that time we took possession of this land. I gave to the Reubenites and Gadites the area extending from Aroer by the Arnon Valley, and half the hill country of Gilead along with its cities.