Self-defense is as justifiable where war is concerned as where one man seeks to take the life of another. . . . Righteous men are entitled, expected, and obligated to defend themselves; they must engage in battle when there is no other way to preserve their rights and freedoms and to protect their families, homes, land, and the truths of salvation which they have espoused(Bruce R. McConkie, Mormon Doctrine, p. 826)