Digital Defense : Goals , Missions , Achievements

battlefield. Some twenty-five hundred years ago, Sun-Tzu taught us that if you knew the enemy and yourself, you would never be in danger in hundreds of battles. Sun-Tzu’s words, “Know your enemy,” mean knowing the enemy leader’s intentions. Sun-Tzu thought that if we knew the enemy's intentions, we could win a victory without war against the enemy. However, it is very difficult to find out the enemy's intentions because the enemy publicly never reveals its intentions. Sun-Tzu taught us that it was very important to employ spies. Thus, he developed the use of spies in various ways. In contrast, Clausewitz did not agree with Sun-Tzu's idea on the importance of employing spies. He thought that it was very difficult to get information from spies in the battlefield and very risky to believe the information from the spies. Therefore, Clausewitz insisted that destroying the enemy by mobilizing the strong military power was far better than relying on information from spies.