Qin dynasty
Note: King Zhaoxiang of Qin (秦昭襄王) had already been ruling Qin for 51 years when Qin annihilated the Zhou dynasty; however the other six warring states were still independent regimes. Some Chinese historiographers thus used the next year (the 52nd year of King Zhaoxiang of Qin) as the official succession from the Zhou dynasty.
Qin dynasty
The Qin were swift in their assault on the other states. They first attacked the Han, directly east, and took their capital city of Xinzheng in 230 BC. They then struck northward; the state of Zhao surrendered in 228 BC, and the northernmost state of Yan followed, falling in 226 BC. Next, Qin armies launched assaults to the east, and later the south as well; they took the Wei city of Daliang (now called Kaifeng) in 225 BC and forced the Chu to surrender by 223 BC. Lastly, they deposed the Zhou dynasty's remnants in Luoyang and conquered the Qi, taking the city of Linzi in 221 BC.