The Art of War is an ancient Chinese military treatise dating from the spring and Autumn Period (roughly 771 to 476 BC). The work, which is attributed to the ancient Chinese military strategist Sun Tzu (also known as Master Sun), is composed of 13 chapters. Each one is devoted to a distinct aspect of warfare and how that applies to military strategy and tactics. For almost 1,500 years it was the lead text in an anthology that would be 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. It has a profound influence on both Eastern and Western military thinking, business tactics, legal strategy and beyond. Sun Tzu was a Chinese general, military strategist, writer, and philosopher who lived in the Eastern Zhou period of ancient China. Sun Tzu is traditionally credited as the author of The Art of War, a widely influential work of military strategy. Apart from his legacy as the author of The Art of War, Sun Tzu is revered in Chinese and East Asian culture as a legendary historical and military figure.