For the rest of his reign, Hasan Buzurg attempted to deal with the Chobanids. He managed to form an alliance with Hassan Kuchak’s uncle Surgan, as well as the governor of Diyarbakır and the Mamluk Sultanate, but Surgan was soon convinced to abandon the alliance, and the Mamelukes withdrew shortly after. He also offered assistance to another of Hassan Kuchak’s uncles, Yagi Basti, as well as to Mas’ud Shah of the Injuids, in their attempt to expel Hassan Kuchak’s cousin Pir Hosayn from Shiraz. The murder of Hassan Kuchak in 1343 did not provide much relief, for his brother Malek Ashraf sent an army to conquer Baghdad in 1347. Jalayirid forces, however, inflicted heavy losses on the force, which was forced to retreat by the summer. While Malek Ashraf and the Chobanids would survive until 1357, their threat to the Jalayirids was diminished. Hasan Buzurg continued to play an influential part in Persian politics; he assisted the Injuid Abu Ishaq against the Muzaffarids, helping him restore his rule in Isfahan in 1353. The latter, however, destroyed the Injuids in 1357.