why was the period between 1467 and 1568 called the age of the warring states
Sengoku period The Sengoku period (戦国時代, Sengoku Jidai, "Age of Warring States"; c. 1467 – c. 1568) is a period in Japanese history marked by social upheaval, political intrigue and near-constant military conflict. Japanese historians named it after the otherwise unrelated Warring States period in China.[1] It was initiated by the Ōnin War, which collapsed the Japanese feudal system under the Ashikaga shogunate, and came to an end when the system was re-established under the Tokugawa shogunate by Tokugawa Ieyasu.[2][3]
Warring States period King Zhuangxiang of Qin ruled for only three years. He was succeeded by his son Zheng, who unlike the two elderly kings that preceded him was only 13 years old at his coronation. As an adult Zheng would turn out to be a brilliant commander who, in the span of just nine years, unified China.[7]