In 1732, Nader Qoli Beg, who had restored Safavid rule in Iran and had become the "de facto" ruler of the country, he made an expedition into the Zagros ranges of western Iran in order to subdue the tribes, whom he considered bandits. He first defeated the Bakhtiari and the Feylis, whom he forced to mass-migrate in larger numbers into Khorasan. He then baited Mehdi Khan Zand and his forces out of their stronghold at Pari, killing the latter and 400 of his Zand kinsmen. The surviving members of the tribe were forced to mass-migrate under the leadership of Inaq Khan Zand and his younger brother Budaq Khan Zand to Abivard and Dargaz, where its able members, including Karim Beg were incorporated into Nader's army.