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
Sovereignty of Puerto Rico during the Cold War Sovereignty of Puerto Rico during the Cold War During the height of the Cold War, Latin America became a strategic pillar of the hemispheric defense doctrine, serving a key to the power struggle between East and West. Following the Cuban Revolution and the overthrow of the friendly government of Fulgencio Batista, the United States became concerned with the spread of the Soviet Union's influence in Latin America, becoming heavily invested in retaining as much influence as possible. With the nuclear arms race at its peak, a Soviet transfer of nuclear warheads to its Latin American ally in Cuba nearly concluded