The sixth aliyah recounts the war the Jews had with Sichon. G-d made them win easily and the Jews possessed the land of Sichon. Similarly, G-d makes them win over the Bashannites even though their cities had strong, high walls, and bars. This is the land given to the tribes of Reuvain and Gad and half of the tribe of Manasseh on the opposite side of the Jordan from Israel.