1954 in the Vietnam War 5 April The National Security Council met again to consider U.S. intervention at Điện Biên Phủ. The Army, including Army Chief of Staff General Matthew Ridgway, was negative, stating that U.S. intervention would require 7 army divisions and heavy air support. 7 April President Eisenhower used the phrase "falling dominoes" in a press conference. This was the origin of the domino theory which postulated that if Vietnam became communist the other nearby states would soon follow. The domino theory was a prominent justification for the Vietnam War in the United States during the 1960s. 14 April Secretary of State John
Canada in the Cold War middle power role in international affairs, and pursued diplomatic relations with Communist countries that the US had severed ties with, such as Cuba and China after their respective revolutions. Canada argued that rather than being soft on Communism, it was pursuing a strategy of "constructive engagement" whereby it sought to influence Communism through the course of its international relationships. Canada had far less of the anti-Communist hysteria that had afflicted the United States. The United States wished the Canadian government would go further, asking for a purging of trade unions, but Canada saw this as American hysteria, and left the