ויתן להם משה לבני גד ולבני ראובן ולחצי שבט מנשה בן יוסף את ממלכת סיחן... ואת ממלכת עוג
The lands which were inhabited by the kingdoms of Sichon and Og were very fertile. Bnei Gad and Bnei Reuven were two tribes which had large herds of sheep and cattle. The fertile grazing land would be a boon for them. They, therefore, approached Moshe Rabbeinu and requested to lay claim to the eastern portion of the Jordan, Eivar ha’Yardein, for themselves and their families. They were granted their wish, and the two tribes, with the added complement of half the tribe of Menashe, were allowed to remain on Eivar haYardein. The question is obvious: Where did the tribe of…