Shanxi was the location of the powerful state of Jin during the Spring and Autumn Period (722 BC - 403 BC), which underwent a three-way split into the states of Han, Zhao and Wei in 403 BC, the traditional date taken as the start of the Warring States Period (403 BC - 221 BC). By 221 BC all of these states had fallen to the state of Qin, which established the Qin Dynasty (221 BC - 206 BC).