What does Joshua 13:21 mean?

and all the cities of the plain, and all the kingdom of Sihon king of the Amorites, who reigned in Heshbon, whom Moses smote with the chiefs of Midian, Evi, and Rekem, and Zur, and Hur, and Reba, the princes of Sihon, that dwelt in the land.

And all the cities of the plain, and all the kingdom of Sihon king of the Amorites, which reigned in Heshbon, whom Moses smote with the princes of Midian, Evi, and Rekem, and Zur, and Hur, and Reba, which were dukes of Sihon, dwelling in the country.

and all the cities of the plain, and all the kingdom of Sihon king of the Amorites, who reigned in Heshbon, whom Moses smote with the chiefs of Midian, Evi, and Rekem, and Zur, and Hur, and Reba, the princes of Sihon, that dwelt in the land.

And all the towns of the table-land, and all the kingdom of Sihon, king of the Amorites, who was ruling in Heshbon, whom Moses overcame, together with the chiefs of Midian, Evi, and Rekem, and Zur, and Hur, and Reba, the chiefs of Sihon, who were living in the land.

and all the cities of the plain, and all the kingdom of Sihon king of the Amorite, who reigned in Heshbon, whom Moses smote, with the princes of Midian, Evi, and Rekem, and Zur, and Hur, and Reba, princes of Sihon, inhabitants of the land.

And all the cities of the plain, and all the kingdoms of Sehon king of the Amorrhites, that reigned in Hesebon, whom Moses slew with the princes of Madian: Hevi, and Recem, and Sur and Hur, and Rebe, dukes of Sehon inhabitants of the land.

all the cities of the plateau, and the whole kingdom of Sihon the king of the Amorites, who reigned at Heshbon, whom Moses smote, him and the princes of Midian, Evi, and Rekem, and Zur, and Hur, and Reba, the chiefs of Sihon dwelling in the land.