Wei Yuan
According to the Qing scholar Wei Yuan (1794–1857), the Dzungar population before the Qing conquest was around 600,000 in 200,000 households. Wei Yuan wrote that about 40 percent of the Dzungar households were killed by smallpox, 20 percent fled to Russia or Kazakh tribes, and 30 percent were killed by Manchu bannermen. For several thousands of li, there were no gers except of those who had surrendered. Wen-Djang Chu wrote that 80 percent of the 600,000 or more Dzungars were destroyed by disease and attack which Michael Clarke described as "the complete destruction of not only the Dzungar state but of the Dzungars as a people."