Sun Tzu is traditionally believed to have authored The Art of War, an influential ancient Chinese book on military strategy considered to be a prime example of Taoist thinking. Sun has had a significant impact on Chinese and Asian history and culture, both as an author of The Art of War and through legend. During the 19th and 20th centuries, Sun's The Art of War grew in popularity and saw practical use in Western society, and his work has continued to influence both Asian and Western culture and politics.

Historians have questioned whether or not Sun was an authentic historical figure. Traditional accounts place him in the Spring and Autumn Period of China (722–481 BC) as a heroic general of the King of Wu who lived c. 544—496 BC. Scholars accepting his historicity place his supposed writing The Art of War in the Warring States Period (476–221 BC), based on the descriptions of warfare in the text. Traditional accounts state that his descendant, Sun Bin, also wrote a master treatise on military tactics.

According to traditional sources, such as the 2nd century BC biography written by Sima Qian, Sun was born in Qi during the Spring and Autumn Period of China (722–481 BC) and became a heroic general for the king of Wu, Helü. His victories then inspired him to write The Art of War. The period was a time of constant war among seven nations (Zhao, Qi, Qin, Chu, Han, Wei and Yan) seeking to control all of China.