יהושע, פרק י״ב, פסוק ה׳

The kingdom of Og east of the Jordan River covered a vast expanse of land, with borders that met the territories of neighboring peoples and kings. His rule encompassed Mount Hermon, Salecah, and the entire region of Bashan, which together formed the northern section of the land east of the Jordan. The reach of his authority extended all the way to the borders of the Geshurites and the Maacathites, small states situated to the northeast of Canaan [ביאור שטיינזלץ].

The region of Gilead was shared between two major powers. The primary approach among commentators is that this area was split directly between King Og and King Sihon. The half of Gilead belonging to Og continued right up to the edge of Sihon's domain. The remaining half of the region was under the firm control of Sihon, the king of Heshbon.