In 1644, when a peasant revolt sacked and occupied Beijing, the Ming general Wu Sangui opened the Shanhai Pass to Manchu armies which completed their conquest and pacification of the former Ming realm around 1683.
The Ming general Wu Sangui opened the Shanhai Pass to Manchu armies. This was in 1644. These Manchu armies completed their conquest and pacification of the former Ming realm around 1683. A peasant revolt sacked. A peasant revolt occupied Beijing.