Answer :
Below is a chronology of major events related to the relationship between the United States and Cuba, Puerto Rico, and the Philippines. 1898: Spanish-American War, 1901, Pratt Amendment, 1959, Cuban Revolution, 1961 and Invasion of the Bay of Pigs.
Determining the most significant event among these is subjective, but some would argue that the Cuban Revolution of 1959 was very important. The Fidel Castro-led revolution led to the establishment of a communist government and dramatically changed relations between the United States and Cuba.
The United States initially supported the Castro revolution, but later became disillusioned when the Castro government nationalized American companies and sought closer ties with the Soviet Union. The strained relationship eventually led to the Bay of Pigs Invasion and the Cuban Missile Crisis, both of which had far-reaching effects on Cold War tensions.
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