What does Joshua 12:5 mean?

He ruled over Mount Hermon, Salecah, all of Bashan up to the border of the Geshurites and Maacathites, and half of Gilead, right up to the border of Sihon, king of Heshbon. Joshua 12:5 - Modern Text Bible

(Og’s kingdom covered the northern Transjordan, including fertile and strategic lands.)