What Persian general took advantage of Nasr ibn Sayyar being preoccupied with a civil war?
Nasr ibn Sayyar Naṣr ibn Sayyār al-Lāythi al-Kināni (Arabic: نصر بن سيار الليثي الكناني‎ ‎ ; 663–748) was an Arab general and the last Umayyad governor of Khurasan in 738–748. Nasr played a distinguished role in the wars against the Turgesh, although he failed to decisively confront the rebellion of al-Harith ibn Surayj in its early stages. Although respected as a soldier and a statesman, he owed his appointment as governor more to his obscure tribal background, which rendered him dependent on the Caliph. His tenure was nevertheless successful, as Nasr introduced long-overdue tax reforms that alleviated social tension and largely restored stabilized Umayyad control in Transoxiana, which had been greatly reduced under the Turgesh onslaught. His last years were occupied by intertribal rivalries and uprisings, however, as the Caliphate itself descended into a period of civil war. In 746 Nasr was driven from his capital by Ibn Surayj and Juday' al-Kirmani, but returned after the latter fell out among themselves, resulting in Ibn Surayj's death. Preoccupied with this conflict, Nasr was unable to stop the outbreak and spread of the Abbasid Revolution, whose leader, Abu Muslim, exploited the situation to his advantage. Evicted from his province in early 748, he fled to Iran pursued by the Abbasid forces, where he died on 9 December 748.
Operation Nasr Operation Nasr, fought in early January 1981, was a major battle of the Iran–Iraq War. It was the biggest tank battle of the Iran–Iraq War.