Kingdom (manga)

Kingdom (キングダム, Kingudamu) is a Japanese manga series written and illustrated by Yasuhisa Hara (原泰久, Hara Yasuhisa). The manga provides a fictionalized account of the Warring States period primarily through the experiences of the war orphan Xin and his comrades as he fights to become the greatest general under the heavens, and in doing so, unifying China for the first time in history. The series was adapted into a thirty-eight episode anime series by studio Pierrot that aired from June 4, 2012 to February 25, 2013. A second season was announced and aired from June 8, 2013 to March 1, 2014. An English language release of the anime was licensed by Funimation.

Question: is kingdom manga based on a true story
Answer: yes