Opposition to United States involvement in the Vietnam War An infamous photo of General Nguyễn Ngọc Loan shooting an alleged terrorist in handcuffs during the Tet Offensive also provoked public outcry. Another element of the American opposition to the war was the perception that U.S. intervention in Vietnam, which had been argued as acceptable because of the domino theory and the threat of communism, was not legally justifiable. Some Americans believed that the communist threat was used as a scapegoat to hide imperialistic intentions, and others argued that the American intervention in South Vietnam interfered with the self-determination of the country and felt that the war in Vietnam was
Historiography of the Cold War expansionism in the immediate years following World War II. Bailey argued Joseph Stalin violated promises he had made at the Yalta Conference, imposed Soviet-dominated regimes on unwilling Eastern European populations and conspired to spread communism throughout the world. From that view, American officials were forced to respond to Soviet aggression with the Truman Doctrine, plans to contain communist subversion around the world and the Marshall Plan. Another prominent "orthodox" historian was Herbert Feis, who in his works like "Churchill, Roosevelt, Stalin" and "From Trust to Terror: The Onset of the Cold War" stated similar views. According to him, Soviet aggression