The biography of Imam Ali included the most human principles and rules, and his war biography was amixture of justice, fairness and mercy. This brief study reached several results, which we summarize asfollows: The Imam hated war and pushed it as long as he found a way to do that. The basic principle forhim is the state of peace, and war is an exceptional and urgent case, and all his wars were self-defence, aresponse to aggression and the payment of sedition and corruption. The Imam prevailed in his battles againsthumanism over the necessities and requirements of war, so love, peace, compassion and mercy were thebasis of his personality, and his perseverance was forgiveness and tolerance, even if that led to the loss ofvictory, as happened in the incident of the law of water in the battle of ((Safin)). The principle of chivalrywas evident in its most beautiful form in the personality of the Imam, with the qualities of honesty, courageand arrogance he carried.