The Collapse of China's Later Han Dynasty, 25-220 CE: The Northwest Borderlands and the Edge of Empire

In the Later Han period the region covering the modern provinces of Gansu, southern Ningxia, eastern Qinghai, northern Sichuan, and western Shaanxi, was a porous frontier zone between the Chinese regimes and their Central Asian neighbours, not fully incorporated into the Chinese realm until the first century BCE. Not surprisingly the region had a large concentration of men of martial background, from which a regional culture characterized by warrior spirit and skills prevailed. This militar...