This expedition may in all probability be dated in 121/739. A year or two later, Na_s_r collected his forces, which included levies from Transoxania, for an attack on Shāsh. Wellhausen considers that the first two expeditions were only stages of the third, but the expedition to Shāsh can hardly have taken place earlier than 122/740, in view of the fact that the armies of Shāsh and Farghāna were engaged with the Türgesh in 739, and of Narshakhī’s statement[101], which there is no reason to dispute, that _T_ughshāda was assassinated in the thirty-second year of his reign. Reckoning in lunar years this gives 122 (91-122), in solar years 123 (710-741), as the date. This is confirmed by the Chinese record of an embassy from Shāsh in 741 complaining that “Now that the Turks have become subject to China, it is only the Arabs that are a curse to the Kingdoms”[102]. 123 is also the date given for the return of the _S_ughdians[103]. It is most unlikely that the intervening year or years passed without expeditions altogether, and the most reasonable supposition is that they were occupied in the pacification of _S_ughd. The expedition marched eastward through Ushrūsana, whose prince, as usual, paid his allegiance to the victor on his passage, but on reaching the Jaxartes Na_s_r found his crossing opposed by the army of Shāsh, together with _H_ārith b. Surayj and some Turkish troops. It would seem that he was unable to come to blows with the main body of the enemy, but made a treaty with the king by which the latter agreed to accept an Arab resident and to expel _H_ārith, who was accordingly deported to Fārāb. As usual, later tradition magnified the exploits of the Arabs by crediting Na_s_r with the capture and execution of Kūr_s_ūl, the Türgesh leader who had been scarcely less redoubtable than the Khāqān himself. If the story has any foundation it is probably a legendary development from the capture of a Turkish chief Al-Akhram, related by _T_abarī in a variant account. The presence of Kūr_s_ūl with a Türgesh force on this occasion is not in itself impossible, but if his identification with Baga Tarkhan is sound, we know that he was executed by the Chinese in 744/126[104]. The expulsion of _H_ārith was probably the object for which the expedition had been undertaken; before returning, however, the Arabs entered Farghāna and pursued its king as far as Qubā before bringing him to terms. The negotiations were carried out between Sulaymān b. _S_ūl, one of the princes of Jūrjān, and the Queen-Mother. This invasion of Farghāna is related in three (or four) different versions, some of which may possibly refer to a second expedition mentioned by _T_abarī later. In the same year, on returning from the expedition to Shāsh, Na_s_r was met at Samarqand by the Bukhār Khudāh _T_ughshāda and two of his dihqāns. The nobles laid a complaint against the prince, but as Na_s_r seemed indisposed to redress their grievance, they attempted to assassinate both