Barak Sultan was notable for having murdered his rival beheading the first
Kazakh Khan in Kazakh history who took citizenship of
Russia — Khan of
Junior Juz Abulkhair Khan. It was revenge for Abulkhair Khan's pro-Russian policy and the last point was the alleged robbery of a caravan laden with gifts from Barak Sultan to the ruler of the
Khanate of Khiva during attacks by Abulkhair Khan against the
Karakalpaks, who were also under Barak Sultan's rule. One of his wives was a daughter of
Galdan Tseren. During that marriage and until the death of Galdan Tseren in 1745 the war and conflicts between Kazakh Khanate and
Dzungar Khanate had been stopped. As a descendant of Genghis Khan Barak wanted to become the ruler of two
Turkic-Mongol states — Dzungar Khanate and
Kazakh Khanate. Barak Sultan and his eldest son had been poisoned by a pro-Russian agent from
Middle Juz in 1750. The death of Barak Sultan opened opportunities to expand Russian Empire over the
Kazakh Steppe. ==References==