The art of war, Sun Tzu

Sun Tzu was a chinese military and strategist, he wrote the book "The Art of War". The book is required in the main military academies of the world and in the marketing and business administration careers. Is basically a book of strategy and gives a series of recommendations and rules to take into account to achieve victory over the enemy in the field of war.
The book has served as an inspiration to militaries and great authors like Clausewitz. Studing the book,we can talk about a philosophy of war, the book has similarities with the work of Aristotle ("the common sense is the proper virtue of the governant") and Nicolas Maquiavelli ("The main activity of the prince is the war")
Sun Tzu clarifies that every advantage over the enemy comes from the virtues of the strategist. He asks: who is the most wisest and most capable commander?, which army has the best trained men?, which is the most disciplined army?
Every successful action begins with good calculations and affirm as a principle: