The Eight Banners system (八旗) :How a Tribal Militia Became the Framework of a Multi-Ethnic Empire
Few institutions in early modern history rival the Eight Banners (八旗, Baqi) in ambition or consequence. Within half a century, it had become the skeleton of the Later Jin (后金) state and then of the Qing dynasty (清朝), which used it to conquer Ming (明) China and to govern the largest and most diverse empire East Asia had ever seen.