The Qing dynasty (1644–1912) was established by conquest and maintained by armed force. The founding emperors personally organized and led the armies, and the continued cultural and political legitimacy of the dynasty depended on their ability to defend the country from invasion and expand its territory. Military institutions, leadership, and finance were fundamental to the dynasty's initial success and ultimate decay. The early military system centered on the Eight Banners, a hybrid institution that also played social, economic, and political roles.

The Eight Banners were administrative and military divisions under the Later Jin and Qing dynasties of China into which all Manchu households were placed. In war, the Eight Banners functioned as armies, but the banner system was also the basic organizational framework of all of Manchu society. Created in the early 17th century by Nurhaci, the banner armies played an instrumental role in his unification of the fragmented Jurchen people and in the Qing dynasty's conquest of the Ming dynasty.