Purpose: This study is to identify major issues related to the revitalization of the US-led UNC and to suggest an appropriate approach strategy for Republic of Korea(ROK). Method: In this research, the history of the United Nations Command(UNC) was reviewed in accordance with the UN Security Council Resolution(UNSCR) enacted in response to the Korean War, which broke out due to North Korea's illegal and surprise invasion of the ROK. A literature review was conducted to identify major issues related to UNC’s revitalization, and the reliability of the study was increased by using the Delphi technique in a qualitative way through a group of experts. Results: Major issues for UNC revitalization were derived as follows. 1. United States' commitment to revitalize UNC, 2. Sustainability of UNC, 3. Establishment of chain of command between UNC and Future Combined Forces Command, 4. Scope of UNC member countries and participation of ROK forces in UNC Staff, 5. Declaration of the end of the Korean War, 6. Future UNC mission and role innovation. Conclusion: Republic of Korea should actively participate in the revitalization of the UNC for the national interests based on strategic clarity even though the ROK is not a founding country of the UNC. The United States is willing to innovate the future mission and role of the UNC as a multinational peacekeeper capable of supporting a peace regime on the Korean Peninsula while maintaining its influence in East Asia. In conclusion, it is important that the UNC continue to support liberal democracy in the Republic of Korea and develop into a multinational peacekeeping force in East Asia.
2. Establishment and Evolution of UNC
3. Progress in Revitalizing the UNC
4. Major Issues and ROK’s Response for Revitalizing the UNC
5. Conclusion and Implication