More wars have probably been started by the truth. Nice slogan, though. The Civil War was started by unreconciled differences, clearly understood by both sides.
Most wars would never start if both sides could have foreseen the outcome in advance. The Civil War, World War I, and II, for example. Only when one side has an overwhelming advantage in force would a war start. Nato was founded to prevent the Soviets from calculating that they could pick off European states one by one, without U.S. interference.