Sun Tzu was a Chinese military general, strategist, philosopher, and writer who lived during the Eastern Zhou period. Sun Tzu is traditionally credited as the author of The Art of War, an influential work of military strategy that has affected both Western and East Asian philosophy and military thought. Sun Tzu is revered in Chinese and East Asian culture as a legendary historical and military figure. His birth name was Sun Wu and he was known outside of his family by his courtesy name Changqing. The name Sun Tzu—by which he is more popularly known—is an honorific which means "Master Sun".

The Art of War is an ancient Chinese military treatise dating from the late Spring and Autumn period. The work, which is attributed to the ancient Chinese military strategist Sun Tzu, is composed of 13 chapters. Each one is devoted to a different set of skills or art related to warfare and how it applies to military strategy and tactics. For almost 1,500 years, it was the lead text in an anthology that was formalized 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, has influenced both East Asian and Western military theory and thinking, and has found a variety of applications in myriad competitive non-military endeavors across the modern world including espionage, culture, politics, business, and sports.