Chapter 1 Changes in Security Environment and Challenges Ahead Chapter 2 National Security Strategy and Defense Policy Chaper 3 Defense Posture for Comprehensive Security Chapter 4 Development of the ROK-U.S. Alliance and Expansion of Defense Diplomacy and Cooperation Chapter 5 Military Support for the Development of Inter-Korean Relationship Chapter 6 Establishing Advanced Military Capabilities Chapter 7 Building a Combat Mission focused Advanced Military Chapter 8 Enhancing the Efficiency of National Defense management Chapter 9 Improving Working Conditions for Service Members Chapter 10 The Armed Forces Serving the Public