 Complete the following phrase:  In 1953, the first successful communist revolution occurred in the Americas, with the Cuban Revolution. An American-sponsored counter-revolutionary invasion was repelled in 1961 during the Bay of Pigs Invasion. The discovery of Soviet missiles in Cuba in 1963 led to a standoff between the United States, and Cuba and the Soviet Union, known as the Cuban Missile Crisis. The crisis escalated to the point where a United States Navy quarantined the island nation. The crisis was eventually resolved when the Soviets agreed to withdraw their missiles from the island, in exchange for the withdrawal of American missiles in Turkey, and Italy; as well as an agreement that the United States would not invade Cuba without direct provocation. The 