The Korean War was not inevitable. Neither was its scope and impact. Decisions by the U.S. government, and particularly the administration of Harry S Truman, made both division and war likely on the Korean peninsula. Had the U.S. reacted differently during the conflict, combat would have ended much earlier or expanded more widely. As always, hindsight clarifies. Some adverse consequences were more predictable than others. Policymakers operating in real time with limited information will always face a difficult challenge. However, several decisions surrounding the Korean War were based on a deeply flawed understanding of the facts or an equally flawed prediction of the consequences of particular actions. This article considers the merits of ten of the most consequential decisions made by U.S. policymakers affecting the onset and course of the Korean War.
To contain Soviet-led communism and, secondarily, to prevent a militarily resurgent Japan, Washington established a network of alliances, bases, and deployments throughout East Asia after World War II. By the 1990s the Soviet Union had imploded, China had become a reasonably restrained international player, and other communist states had lost their ideological edge. At the same time, the noncommunist nations had leaped ahead economically. Despite such momentous developments, however, U.S. policy remains fundamentally the same.