King Zhaoxiang of Qin
Reigning over 55 years, he was one of the longest-serving rulers during the Eastern Zhou Dynasty. Although making numerous policy mistakes during his later years, his aggressive territorial expansions were pivotal in consolidating the state of Qin as the dominant military powerhouse in the late Warring States period. It was the strategic dominance established during his reign that paved the way to Qin's eventual successful unification of China under his great-grandson, Ying Zheng.
King Zhaoxiang of Qin
The next Chu king, King Qingxiang, was an even less competent ruler than his father. In 280 BC, Qin forces defeated the Chu army again, forcing them to cede Shangyong and Hanbei (漢北) to Qin control. In 279 BC, Qin generals Bai Qi (白起) and Zhang Ruo (張若) launched amphibious assaults on Chu from two different fronts, capturing the cities of Deng (鄧), Yan (鄢, Chu's secondary capital at the time) and Xiling (西陵), during which Bai Qi flooded the city of Yan with a redirected river, drowning hundreds of thousands of people. This successful Qin campaign paved the way for Bai Qi's subsequent siege and capture of the Chu capital city of Ying (郢) in 278 BC, where Bai Qi burned the Chu ancestral mausoleums Yiling. The greatly weakened state of Chu was forced to relocate its capital to Chen (陳). Qin then permanently annexed the vast lands around Dongting Lake, south of the Yangtze River and north up towards Anlu (安陸), where the new Nan Commandery (南郡) was established.