Qin's wars of unification

Qin's wars of unification
Part of the Warring States period
Date of conquest of the six states
Date 230–221 BC Location China Result Qin victory Territorial changes Unification of China under the Qin dynasty
Belligerents
Qin	Han Zhao Dai Yan Wei Chu Qi
Commanders and leaders
Ying Zheng Wang Jian Li Xin Meng Wu Meng Tian Wang Ben Huan Yi Qiang Hui	Han An Zhao Qian Zhao Jia Wei Jia Yan Xi Tian Jian Li Mu Lord Changping
Strength
1,200,000[citation needed]	1,500,000[citation needed]

Qin's wars of unification were a series of military campaigns launched in the late 3rd century BC by the state of Qin against the other six powers remaining in China — Han, Zhao, Yan, Wei, Chu and Qi. Between 247 and 221 BC, Qin had developed into one of the most powerful of China's Seven Warring States that coalesced in the wake of the Zhou dynasty's decline, by now retaining a weak and merely ceremonial position among the warring states. In 230 BC, King Ying Zheng of Qin began the sequence of campaigns that would bring the Warring States period to a close, setting out to conquer each remaining sovereign one by one. This was completed in 221 BC with the fall of Qi, leaving the former Zhou sphere unified under a more centralized Qin control. Ying Zheng declared himself the First Emperor, or Qin Shi Huang—becoming the first sovereign over a unified China under the imperial Qin dynasty.