By the Spring and Autumn Period (770 BC - 476 BC), the territory of today's Hubei was part of the powerful state of Chu. Chu was nominally a tributary state of the Zhou Dynasty, and it was itself an extension of the Chinese civilization that had emerged some centuries before in the north; but it was also culturally unique, and was a powerful state that held onto much of the middle and lower Yangtze River, with power extending northwards into the North China Plain. During the Warring States Period (475 BC - 221 BC) Chu became the major adversary of the upstart state of Qin to the northwest (in what is now Shaanxi province), which began to assert itself by outward expansionism. As wars between Qin and Chu ensued, Chu lost more and more land: first its dominance over the Sichuan Basin, then (in 278 BC) its heartland, which correspond to modern Hubei. In 223 BC Qin chased down the remnants of the Chu regime, which had fled eastwards, as part of Qin's bid for the conquest of all China.    Hi Res Pic (165K)