This inquiry leads students through an investigation of how the Korean War came to be known as the “forgotten war.” By investigating the compelling question, “Why was the Korean War ‘forgotten’?,” students investigate how a major global event could seem to have been forgotten by the American public and, subsequently, in history. The inquiry has students consider the progression of the “conflict” to a “war,” actions of those in power during Harry S. Truman’s US presidency, the views of veterans and those on the home front, and the portrayal of Korea in US history textbooks. This leads students to questions of how the Korean War differed from previous and subsequent military engagements in terms of the remote threat it posed to the American people and an underlying Cold War sentiment that evolved from anti-communism to containment. Teachers should also help students understand how the process of “forgetting” the Korean War reflects geopolitical events as well as domestic concerns.