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.
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.