As soon as Abu Moslim had consolidated his authority, he sent his chief general Qahtaba against Nishapur.
Qahtaba detached his son Masan against Nasr and went himself to meet Nobata, whom he beat on the ist of Dhu`l-hijja 130 (6th August 748).
Near Nehawend, Ibn l)obara, at the head of a large army, encountered Qahtaba, but was defeated and killed.
In the month of Dhu`l-ga`da 131 (June 749) Nehawend (Nehavend) surrendered, and thereby the way to Irak lay open to Qahtaba.
Qahtaba himself perished in the combat, but his son Hasan entered Kufa without any resistance on the 2nd of September 749.
After the conquest of Nehawend, Qahtaba had detached one of his captains, Abu `Aun, to Shahrazur, where he defeated the Syrian army which was stationed there.
Qahtaba, the commander of Mansur's army, was defeated, only a small division under `Isa b.
Qahtaba made a victorious raid as far as Adhruliya (Dorylaeum); it was on his proposition that Mandi resolved on building the frontier town called Iladath (Adata), which became an outpost.
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