Meanwhile, the amirs in Khurasan adopted their own candidate for Ilkhan, Togha Temür. Togha set off in 1337 to subdue western Persia. Azarbaijan and 'Iraq-i 'Ajam were taken. In March he arrived before Sultaniyeh, the former capital of the Ilkhans, and Hasan Buzurg withdrew to Arran. Musa's forces, initially battling Togha's, now joined the invader. Togha and Musa met Hasan Buzurg at Soghurlug in the Maragheh area on 15 June 1337; Hasan defeated them, took Musa and Togha Temür's emir Shaykh Ali prisoner shortly after, and executed them on 10 July 1337. Togha gave up the campaign and withdrew to eastern Persia. With Muhammad's and Hasan's position solidified, Eretna was appointed governor of Anatolia. Hasan spent the winter of 1338 in Mughan.