AROER.—Three distinct places. 1. ‘Aroer which is by the brink of the river Arnon’ (Deu_2:36) is probably the ruin ‘Arâ‘ir, on the north bank of the Wady Mojib (Arnon). In such a position it necessarily became a frontier town, and as such is mentioned (cf. Deu_2:36, 2Ki_10:33 etc.). It was captured by Sihon, king of the Amorites (Deu_2:36; Deu_4:48, Jos_12:2; Jos_13:9, Jdg_11:26); when conquered by Israel it was assigned to Reuben (Deu_3:12); it was taken by Hazael, king of Syria (2Ki_10:33), and apparently later on by Moab (Jer_48:19). 2. A city of Judah (1Sa_30:28), perhaps the ruin ‘Ar‘âra, 12 miles east of Beersheba. 3. A city of Gad near Rabbah, i.e. ‘Amman (Jos_13:25, Jdg_11:33). The site is unknown.