Han Chinese Banners were made up of Han Chinese who defected to the Qing up to 1644 and joined the Eight Banners, giving them social and legal privileges in addition to being acculturated to Manchu culture. So many Han defected to the Qing and swelled the ranks of the Eight Banners that ethnic Manchus became a minority, making up only 16% in 1648, with Han Bannermen dominating at 75% and Mongol Bannermen making up the rest. This multi-ethnic force in which Manchus were only a minority conquered China for the Qing.