After the succession of the Yongzheng Emperor in 1722, a series of reductions of Qing forces in Tibet occurred. However, Lhasa nobility who had been allied with the Dzungars killed Kangchennas and took control of Lhasa in 1727, and Polhanas fled to his native Ngari. Qing troops arrived in Lhasa in September, and punished the anti-Qing faction by executing entire families, including women and children.