Ancient kindom in Northern China. Created when the Dukedom of Jin disintegrated in 453 B.C. after a long stretch of clan wars. The tripartite seperation of Jin was recgonized by the emperor in 403 B.C.
Wei ceased to exist as a nation-state in 221 B.C. when
Zheng, king of Qin, completed his conquest, forming the core of what is now modern day China.