The Art of War is an ancient Chinese military treatise dating from the Late Spring and Autumn Period (roughly 5th century BC). The work, which is attributed to the ancient Chinese military strategist Sun Tzu ("Master Sun", also spelled Sunzi), is composed of 13 chapters. Each one is devoted to an aspect of warfare and how it applies to military strategy and tactics.

For almost 1,500 years it was the lead text in an anthology that would be formalised as the Seven Military Classics by Emperor Shenzong of Song in 1080. The Art of War remains the most influential strategy text in East Asian warfare and has influenced both Eastern and Western military thinking, business tactics, legal strategy and beyond.

Scholars do not know how The Art of War came to be—and whether or not “Sun Tzu,” if he existed, had anything to do with its creation. What they do know is that copies of the book, typically written on sets of sewn-together bamboo slats, ended up in the hands of politicians, military leaders and scholars across China. From there, translated copies of “Sun Tzu’s” work found their way to Korea and Japan. (The oldest Japanese version dates from the 8th century A.D.)