s a Chinese military treatise that is attributed to Sun Tzu (also referred to as "Sunzi" and "Sun Wu"), a military strategist of the State of Wu who was active in the late-sixth century BC, during the late Spring and Autumn period. . Composed of 13 chapters, each of which is devoted to one aspect of warfare, it is said to be the definitive work on military strategies and tactics of its time, and is still read for its military insights.