The United States of America has and continues to have a long-standing adversarial relationship with North Korea. As Presidential administrations turn over, the U.S. policy on North Korea remains largely unchanged due to North Korea's unpredictable, volatile, and oftentimes erratic behavior as perceived from a global premise over the past 60 years. This condition exists because of the dictatorial regimes of Kim Jong Un and his predecessors. North Korea isolates itself from the rest of the global community through the auspices of communist ideals and provocations that led to damaging ties with its neighbors. North Korea's provocations historically have led to hunger, famine, malnutrition, and violation of human rights. The purpose of this qualitative case study analysis is to determine how the U.S. and the Republic of Korea militaries sustain and support a North Korean regime collapse using data triangulation and purposeful sampling to base North Korea against three other case studies. The significance of the relationship is that it may inform the audience of how the current sustainment architecture on the peninsula can dependably support the Republic of Korea as in the best political, economic, and strategic interests of the U.S. This research is significant in relation to the vision of the President of the United States in his strategic military rebalance towards the Pacific.