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.
Military history of the Jin dynasty (266–420) and the Sixteen Kingdoms (304–439)
Later Qin was a Qiang kingdom founded by Yao Chang in 384. Yao Chang killed Fu Jian in 385 and proclaimed himself emperor in 386. It conquered Former Qin in 394 and obtained submission from Western Qin in 400 and Later Liang in 403. It was conquered by Jin in 417.