The Korean War was the first major hot war in the Cold War era, which made the great powers deeply aware of the need for a limited war. Technically, the Korean War has not ended. In the case of an all-out war, South Korea sets a goal of defeating attack from North Korea and eventually achieving unification. Accordingly, the objective of military strategy is to occupy the entire North Korean territory based on total war concept. However, anticipated catastrophic damage, North Korea's use of nuclear weapons and possibility of third-party military intervention call for a cold-hearted review of plausibility of existing objectives and strategies. Military strategies can change depending on political objectives which could be affected by combinations of various factors such as political decision, North Korea's war strategy, US-ROK alliance and neighboring countries' strategy. If the political objective and military strategy are too rigid, it will be difficult to take dominance of the war and finish the war under favorable conditions. In recognition of these problems, this article argues that the concept of limited war should be applied to develop military strategy.