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
Tanks in the Cold War M1 Abrams, the Challenger and by any other contemporary Western main battle tank during the 2003 invasion of Iraq. Tanks in the Cold War During the Cold War (1945–1990), the two opposing forces in Europe were the Warsaw Pact countries on the one side, and the North Atlantic Treaty Organization (NATO) countries on the other side. The Warsaw Pact was seen by the West as having an aggressive force outnumbering the NATO forces. Soviet domination of the Warsaw Pact led to effective standardization on a few tank designs. In comparison, NATO adopted a defensive posture. The major contributing nations, France,