三国两晋时的世兵制魏(曹操)、蜀(刘备)、吴(孙权)三国鼎立,战争连年,人口锐减(由汉顺帝时的四千九百多万,减少到七百六十七万),户籍混乱,兵源非常缺乏。鼎立的三方为了扩大军队,以制胜于人,都先后强制实行世袭兵役制,简称世兵制。这一制度 During the Three Kingdoms and Jin dynasties, the Wei soldiers (Cao Cao), Shu (Liu Bei) and Wu (Sun Quan) during the Three Kingdoms and Jin Dynasties reached the top of their war. In successive years, the population dropped sharply (from 49 to 40 million at Han Shun Di, to 767 Million), confusion in household registration, and the lack of military sources. In order to expand the army to win over others, the tripartite tripartite establishment has successively forced the hereditary military service system to be abbreviated as the private soldier system. This system