Straight out of The Art of War: When you surround an army, leave an outlet free. [This does not mean that the enemy is to be allowed to escape. The object, as

Straight out of The Art of War: When you surround an army, leave an outlet free. [This does not mean that the enemy is to be allowed to escape. The object, as Tu Mu puts it, is "to make him believe that there is a road to safety, and thus prevent his fighting with the courage of despair." Tu Mu adds pleasantly: "After that, you may crush him."] http://www.gutenberg.org/cache/epub/132/pg132.txt http://www.gutenberg.org/cache/epub/132/pg132.txt