Early records indicate that Sun-Tzu lived in the Warring state era and his very famous work The Art of War was influenced by the increasing violence of this era. In contrast to its name, the book does not really focus on war time strategies, but on strategies that would prevent the outbreak of war. The core of the strategy for Sun Tzu is not to defeat the enemy in battle, but to repress him without fighting. Sun Tzu therefore focuses on the pre-war period as the realm for strategy and hence pays particular attention to diplomacy at this stage. Sun-Tzu makes a number of suggestions for the use of diplomacy mostly before the war, but even usable during and after the war, all of which seem to be very important to be a good diplomacy player in international relations. He first advices to attack the enemy’s strategy before attacking the enemy itself. He then mentions indirect methods for manipulating the enemy’s actions in order to keep away the danger of being attacked. Another strategy Sun-Tzu suggests is to be flexible in strategy in regard to changing circumstances.  Finally, his famous saying of “all war is based on deception” is another piece where his thoughts could be related to the logic of diplomacy.