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
Canada in the Cold War student at Cambridge and Harvard he was a part of a Marxist communist study group. This made Pearson, who was still External Affairs Minister, backed by outrage across the country, send a note to the US Government, threatening to offer no more security information on Canadian citizens until it was guaranteed that this information would not slip beyond the executive branch of the government. It was during the Cold War period that Canada began to assert the international clout that went along with the reputation it had built on the international stage in World War I and World War II.