What does Joshua 12:2 mean?

Sihon king of the Amorites, who dwelt in Heshbon, and ruled from Aroer, which is on the edge of the valley of the Arnon, and the city that is in the middle of the valley, and half Gilead, even unto the river Jabbok, the border of the children of Ammon;

Sihon king of the Amorites, who dwelt in Heshbon, and ruled from Aroer, which is upon the bank of the river Arnon, and from the middle of the river, and from half Gilead, even unto the river Jabbok, which is the border of the children of Ammon;

Sihon king of the Amorites, who dwelt in Heshbon, and ruled from Aroer, which is on the edge of the valley of the Arnon, and the city that is in the middle of the valley, and half Gilead, even unto the river Jabbok, the border of the children of Ammon;

Sihon, king of the Amorites, who was living in Heshbon, ruling from Aroer, which is on the edge of the valley of the Arnon, and the town in the middle of the valley, and half Gilead, as far as the river Jabbok, the limits of the children of Ammon;

Sihon, king of the Amorite, who is dwelling in Heshbon, ruling from Aroer which <FI>is<Fi> on the border of the brook Arnon, and the middle of the brook, and half of Gilead, and unto Jabok the brook, the border of the Bene-Ammon;

Sehon king of the Amorrhites, who dwelt in Hesebon, and had dominion from Aroer, which is seated upon the bank of the torrent Arnon, and of the middle part in the valley, and of half Galaad, as far as the torrent Jaboc, which is the border of the children of Ammon.

Sihon the king of the Amorites, who dwelt at Heshbon, [and] ruled from Aroer, which is upon the bank of the river Arnon, and from the middle of the ravine, and over half Gilead, as far as the river Jabbok, [which is] the border of the children of Ammon;