Psychological, << `sy` kuh LOJ uh kuhl, >> warfare uses propaganda to reach certain goals. It can be used before a war to deter fighting, or during a war to win it. A nation uses psychological warfare to convince its potential enemies that they cannot possibly win, and that they should not start to fight. During a war, it uses psychological warfare to convince enemy troops that their cause is unjust and hopeless. Its goal is to destroy the enemy’s will to fight.