The Art of War
History: 

Text and commentaries: The Art of War is traditionally attributed to an ancient Chinese military general known as Sun Tzu meaning "Master Sun". Sun Tzu is usually linked with existing in the 6th century BC; the earliest sections of The Art of War, however, most likely date to at least 100 years after him.
Sima Qian's Records of the Grand Historian, the first of China's 24 dynastic histories, records an early Chinese tradition that a text on military matters was written by one "Sun Wu" (孫武) from the State of Qi, and that this text had been read and studied by King Helü of Wu (r. 514 BC – 495 BC). This text was traditionally identified with the received Master Sun's Art of War. The conventional view was that Sun Wu was a military theorist from the end of the Spring and Autumn period (776–471 BC) who fled his home state of Qi to the southeastern Kingdom of Wu, where he is said to have impressed the king with his ability to quickly train even court women in military discipline and to have made Wu's armies powerful enough to challenge their western rivals in the state of Chu. This view is still widely held in China.
The strategist, poet, and warlord Cao Cao in the early 3rd century AD authored the earliest known commentary to the Art of War. Cao's preface makes clear that he edited the text and removed certain passages, but the extent of his changes were unclear historically. The Art of War appears throughout the bibliographical catalogs of the Chinese dynastic histories, but listings of its divisions and size varied widely.

Authorship: Beginning around the 12th century, Sun Tzu's historical existence began to be questioned by Chinese scholars, primarily on the grounds that he is not mentioned in the historical classic The Commentary of Zuo (Zuo Zhuan), which mentions most of the notable figures from the Spring and Autumn period. The name "Sun Wu" (孫武) does not appear in any text prior to the Records of the Grand Historian, and has been suspected to be a made-up descriptive cognomen meaning "the fugitive warrior", glossing the surname "Sun" as the related term "fugitive" (xùn 遜), while "Wu" (wǔ 武) is (1) the ancient Chinese virtue of "martial, valiant" and (2) a Jianghuai dialectal synonym of 士; shì "knight", which corresponds to Sunzi's role as the hero's doppelgänger in the story of Wu Zixu. In the early 20th century, the Chinese writer and reformer Liang Qichao theorized that the text was actually written in the 4th century BC by Sun Tzu's purported descendant Sun Bin, as a number of historical sources mention a military treatise he wrote. Unlike Sun Wu, Sun Bin appears to have been an actual person who was a genuine authority on military matters, and may have been the inspiration for the creation of the historical figure "Sun Tzu" through a form of euhemerism.
In 1972, the Yinqueshan Han slips were discovered in two Han dynasty (206 BC – 220 AD) tombs near the city of Linyi in Shandong Province. Among the many bamboo slip writings contained in the tombs, which had been sealed between 134 and 118 BC, respectively were two separate texts, one attributed to "Sun Tzu", corresponding to the received text, and another attributed to Sun Bin, which explains and expands upon the earlier The Art of War by Sunzi. The Sun Bin text's material overlaps with much of the "Sun Tzu" text, and the two may be "a single, continuously developing intellectual tradition united under the Sun name". This discovery showed that much of the historical confusion was due to the fact that there were two texts that could have been referred to as "Master Sun's Art of War", not one. The content of the earlier text is about one-third of the chapters of the modern The Art of War, and their text matches very closely. It is now generally accepted that the earlier The Art of War was completed sometime between 500 and 430 BC.

The 13 chapters: The Art of War is divided into 13 chapters (or piān); the collection is referred to as being one zhuàn ("whole" or alternatively "chronicle").

Cultural influence: 

Military and intelligence applications: Across East Asia, The Art of War was part of the syllabus for potential candidates of military service examinations.
During the Sengoku period (c. 1467–1568), the Japanese daimyō Takeda Shingen (1521–1573) is said to have become almost invincible in all battles without relying on guns, because he studied The Art of War. The book even gave him the inspiration for his famous battle standard "Fūrinkazan" (Wind, Forest, Fire and Mountain), meaning fast as the wind, silent as a forest, ferocious as fire and immovable as a mountain.
The translator Samuel B. Griffith offers a chapter on "Sun Tzu and Mao Tse-Tung" where The Art of War is cited as influencing Mao's On Guerrilla Warfare, On the Protracted War and Strategic Problems of China's Revolutionary War, and includes Mao's quote: "We must not belittle the saying in the book of Sun Wu Tzu, the great military expert of ancient China, 'Know your enemy and know yourself and you can fight a thousand battles without disaster.'"
During the Vietnam War, some Viet Cong officers extensively studied The Art of War and reportedly could recite entire passages from memory. General Võ Nguyên Giáp successfully implemented tactics described in The Art of War during the Battle of Dien Bien Phu ending major French involvement in Indochina and leading to the accords which partitioned Vietnam into North and South. General Giáp, later the main PVA military commander in the Vietnam War, was an avid student and practitioner of Sun Tzu's ideas.

Outside East Asia: The United States' defeat in the Vietnam War, more than any other event, brought Sun Tzu to the attention of leaders of U.S. military theory. The Department of the Army in the United States, through its Command and General Staff College, lists The Art of War as one example of a book that may be kept at a military unit's library. The Art of War is listed on the US Marine Corps Professional Reading Program (formerly known as the Commandant's Reading List). It is recommended reading for all United States Military Intelligence personnel. The Art of War is also used as instructional material at the United States Military Academy (commonly known as West Point), in the course Military Strategy (470). It is also recommended reading for Officer cadets at the Royal Military Academy, Sandhurst. Some notable military leaders have stated the following about Sun Tzu and The Art of War:

"I always kept a copy of The Art of War on my desk." – General Douglas MacArthur, 5 Star General and Supreme Commander for the Allied Powers.
"I have read The Art of War by Sun Tzu. He continues to influence both soldiers & politicians." – General Colin Powell, Chairman of the Joint Chiefs of Staff, National Security Advisor, and Secretary of State.
According to some authors, the strategy of deception from The Art of War was studied and widely used by the KGB: "I will force the enemy to take our strength for weakness, and our weakness for strength, and thus will turn his strength into weakness".

Application outside the military: The Art of War has been applied to many fields outside of the military. Much of the text is about how to outsmart one's opponent without actually having to engage in physical battle. As such, it has found application as a training guide for many competitive endeavors that do not involve actual combat.
The Art of War is mentioned as an influence in the earliest known Chinese collection of stories about fraud (mostly in the realm of commerce), Zhang Yingyu's The Book of Swindles (Du pian xin shu, 杜騙新書, c. 1617), which dates to the late Ming dynasty.
Many business books have applied the lessons taken from the book to office politics and corporate business strategy. Many Japanese companies make the book required reading for their key executives. The book is also popular among Western business circles citing its utilitarian values regarding management practices. Many entrepreneurs and corporate executives have turned to it for inspiration and advice on how to succeed in competitive business situations. The book has also been applied to the field of education.
The Art of War has been the subject of legal books and legal articles on the trial process, including negotiation tactics and trial strategy.
The book The 48 Laws of Power by Robert Greene employs philosophies covered in The Art of War.
The Art of War has also been applied in sports. National Football League coach Bill Belichick, record holder of the most Super Bowl wins in history, has stated on multiple occasions his admiration for The Art of War. Brazilian association football coach Luiz Felipe Scolari actively used The Art of War for Brazil's successful 2002 World Cup campaign. During the tournament Scolari put passages of The Art of War underneath his players' doors at night.
Playing To Win by David Sirlin analyses applications of the ideas from The Art of War in modern esports.