The intervention of superpowers in the Korean War, particularly by the United States, significantly shaped the evolution of American military doctrine and strategy by influencing the development of tactics, technology, and the concept of containment in subsequent conflicts.
A stronger thesis statement could be: "The superpower intervention in the Korean War, led by the United States, fundamentally transformed American military doctrine and strategy, paving the way for a new era of global interventionism and power projection in the Cold War era and beyond."