The defeat of Bashan

In Numbers, chapter 21:31-35, the Israelites settled in the land of the Amorites.  Moses sent spies to Jazer and took its villages.  Jazer was about 15 miles north of Heshbon.  Then they turned north and went up the road to Bashan.  There they defeated King Og of Bashan in the battle of Edrei, one of the capital cities in Bashan.  Yahweh had told Moses to not be afraid of him because he was going to be like King Sihon.  Thus, the Israelites killed him, his sons, and all his people, until there was not a survivor left.  They took possession of his land.  King Og was considered to be a giant, who ruled Bashan.  This was another great victory at Edrei, but there was no mention of who the leader of the Israelites was.  However, it was clear that these Amorites were utterly wiped out, not a single survivor.  The Israelites were settling into these former Amorite lands, since there were no Amorites left.  Basically, the east bank of the Jordan River was in the hands of the Israelites.  Did you realize that the east bank of the Jordan River was part of ancient Israel?