The Methods of the Sima (simplified Chinese: 司马法; traditional Chinese: 司馬法; pinyin: Sīmǎ Fǎ, also known as The Marshal's Art of War) is a text discussing laws, regulations, government policies, military organization, military administration, discipline, basic values, tactics, and strategy. It is considered to be one of the Seven Military Classics of ancient China. It was developed in the state of Qi during the 4th century BC, in the mid-Warring States period.