Warring States period

The Warring States period is presented as an age of rival states fighting toward the creation of a single empire. In the book, it matters both as part of the long historical cycle of division and reunification and as the setting to which Zhang Song traces a supposedly new military treatise, exposing its borrowed antiquity.

Definition and Historical Place

The book’s explanatory note characterizes the Warring States period as an era of warfare among states seeking to conquer one another and establish a unified Chinese empire. It gives the period’s conventional dates as 475 to 221 BC. The era therefore occupies a specific place in the book’s account of recurring political fragmentation: conflict among multiple powers eventually yields to consolidation under one ruler.

That pattern is set within a longer dynastic sequence. The book describes the Zhou realm breaking into seven kingdoms, followed by the Qin conquest of the competing states; after Qin’s brief rule came the contest between Chu and Han, ending in Han unification. The later division of the Han realm into three kingdoms is presented as another turn in this recurring history, not an unprecedented collapse.

Zhang Song’s Challenge to Cao Cao

The period’s most pointed appearance comes through a dispute over Cao Cao’s The New Treatise of Meng De. Yang Xiu presents the scroll as a work Cao Cao composed on the basis of Sun Zi’s famous Thirteen Strategies. Zhang Song reads its thirteen chapters and argues that the material is no innovation: he says that children in Shu know the old text and that it was written centuries earlier, in the Warring States period.

When Yang Xiu challenges him to prove the claim, Zhang Song repeats the text word for word after a single reading. Yang Xiu responds with astonishment and admiration. The episode turns the period into a measure of antiquity and authorship: what is presented as Cao Cao’s strategic learning is, in Zhang Song’s account, a reproduction of knowledge already old in the age of competing states. The scene also establishes Zhang Song’s exceptional memory and learning through a concrete demonstration, rather than relying on his assertion alone.

A Precedent for Division and Unification

The Warring States period’s significance extends beyond the book’s explicit reference to the treatise. Its account of fractured polities competing for supremacy echoes the later emergence of three leaders who carve kingdoms from the declining Han realm. The book names Liu Bei, referred to throughout as Xuande, Cao Cao, and Sun Quan as the figures who establish the Three Kingdoms. The earlier era thus gives the later struggle a historical frame: political division can endure through warfare, yet the contest may also lead toward renewed unity.

The comparison is structural rather than a claim that the periods are identical. The book places the Warring States among successive examples of fragmentation followed by consolidation, then uses that pattern to make the Han’s disintegration intelligible as part of a repeating historical cycle. Its mention in Zhang Song’s exchange adds a second function: the period is not only an age of state-making conflict, but also a repository of military writing whose authority can be invoked to challenge claims of originality.