The Art of War partitioned Vietnam into North and South. General Võ, later the main PVA military commander in the Vietnam War, was an avid student and practitioner of Sun Tzu's ideas. America's defeat there, more than any other event, brought Sun Tzu to the attention of leaders of American military theory. Finnish Field Marshal Mannerheim and general Aksel Airo were avid readers of "Art of War". They both read it in French; Airo kept the French translation of the book on his bedside table in his quarters. The Department of the Army in the United States, through its Command and General Staff College,
Leadership trust results in folly. Dependence on the strength of courage results in violence. Excessive discipline and sternness in command result in cruelty. When one has all five virtues together, each appropriate to its function, then one can be a leader. — Sun Tzu Machiavelli's "The Prince", written in the early 16th century, provided a manual for rulers ("princes" or "tyrants" in Machiavelli's terminology) to gain and keep power.In the 19th century the elaboration of anarchist thought called the whole concept of leadership into question. (Note that the "Oxford English Dictionary" traces the word "leadership" in English only as far back