A general history of the critical first year of the Korean War, this study deals primarily with relations between General Douglas MacArthur and President Harry S. Truman from June 1950 to April 1951, a period that defined the war's direction until General Mark Clark, the final U.N. Commander, signed the Armistice two years later. Although the ever-changing military situation is outlined, the main focus is on policymaking and the developing friction between Truman and MacArthur. Wainstock contradicts the common view that MacArthur and Truman were constantly at odds on the basic aims of the...