Arnon was now the boundary between Moab and the new kingdom of Sihon the Amorite. Sihon refused permission to the Israelites to pass through his territories, along the ‘royal highway,’ and endeavoured to stop their advance. But the tribes were no longer the undisciplined rabble who had fled from the Canaanites of Zephath, and the result of the struggle was the complete overthrow of the Amorite forces. The district between the Arnon and the Jabbok, which had been taken by Sihon from ‘the former king of Moab,’ was occupied by the Israelites, who accordingly established themselves midway between Moab and Ammon. It is on the occasion of this conquest that the Hebrew historian has preserved the fragment of an Amorite song of triumph which had celebrated the capture of Ar, the Moabite capital, and which was now embodied by the Israelites in a similar song of triumph for their own victory over Sihon. Ammon was too strong to be attacked (Numb. xxi. 24), but ‘Moses sent to spy out Jaazer,’ not far from Rabbah, the future capital of the Ammonites, and the fall of the Amorite city of Jaazer brought with it the conquest of Gilead. The tribes of Reuben and Gad were settled in the newly-acquired districts, on condition, however, that they should acknowledge their relationship to the rest of the tribes, and help the latter in case of necessity (Numb. xxxii. 29-32; Judg. v. 15-17). Gilead had been conquered by Machir, a branch of the tribe of Manasseh (Numb. xxxii. 39; Deut. iii. 15; Judg. v. 14), and the conquest was subsequently extended further by armed bands under chieftains, like Jair and Nobah, who occupied outlying districts on their own account.[236] The Havoth-Jair, or ‘Villages of Jair,’ were in the ‘stony’ region of Argob, the Trachonitis of Greek geography, which extended northward to the Aramaic kingdoms of Geshur and Maachah. It formed part of the ‘Field of Bashan,’ which in the Mosaic age was ruled by Og ‘of the remnant of the Rephaim.’ Like Sihon, he is called an Amorite, and his two capitals were at Edrei and Ashtaroth-Karnaim.[237] His rule was acknowledged from the Haurân in the south to Mount Hermon in the north, and he must thus have been one of the native princes who arose out of the ruins of the Egyptian empire. But his power was shortlived. He was unable to withstand the shock of the invaders from the desert, and his dominions became Israelitish territory. It would seem that what was afterwards the eastern side of Ammon was included in his kingdom, since in after ages a huge sarcophagus of black basalt, which was preserved in Rabbah of Ammon, was pointed out as his ‘iron bed’ (Deut. iii. 11).