He destroyed many nations and killed powerful kings,
Israel defeated them and took over the Amorite territory from the gorge of the River Arnon in the south to the gorge of the River Jabbok in the north. Beyond the Jabbok was the territory of the Ammonites, who were much stronger than Israel.
So the Israelites wiped out Og, his family, and his entire army—there were no survivors. Then Israel took over the land of Bashan.