In the 18th century, the Qing went to war against the Dzungar Khanate. Ürümqi was taken by the Qing in 1755, and the Dzungars of the region were eliminated in the Dzungar genocide. One writer, Wei Yuan, described the resulting desolation in what became northern Xinjiang as "an empty plain for a thousand "li", with no trace of man". A fort was built (either in 1755 or 1758 depending on sources), and the Qing then established garrisons of Manchu and Mongol bannermen and Han Chinese troops at Ürümqi. After 1759, the Qing government established state farms in the under-populated areas around Ürümqi, where there was fertile, well-watered land. Manchu soldiers also constructed a temple with red walls dedicated to Guandi on Pingding mountain overlooking Ürümqi, which gave Ürümqi its nickname, Red Temple.