Cuban government confiscated U.S. businesses and branches of American banks on the island without compensation.
In October the government confiscated all Cuban-owned businesses, industries and banks. No compensation was paid.
October 14: Government approved Urban Reform Law that affected ownership of rented property.
October 24: Resolution No. 3 resulted in the expropriation without compensation of the remaining foreign and privately owned commercial, industrial, and service enterprises in the country.
By the end of the year, all media companies had been confiscated and taken over by the government.
December: Cuban parents began sending their unaccompanied children to the United States in an operation that became known as Pedro Pan. Over fourteen thousand children were part of this program.
January 2: Castro demanded the U.S. to reduce its embassy personnel to eleven employees.
January 3: U.S. President Dwight Eisenhower retaliated by breaking diplomatic relations with Cuba.
April 16: Castro for the first time referred to the Cuban revolution as Socialist.
April 17: U.S. sponsored Cuban exiles Brigade 2506 invaded Cuba at the Bay of Pigs. Without adequate air coverage, after three days the invasion failed.
May 1: Castro proclaimed Cuba a Communist state.
September 16: Government clashed with the Catholic Church and expelled more than three hundred priests and religious persons from the island.
December 2: Castro in a television speech indicated that for many years he had been a Marxist-Leninist.
October 4: Atomic missile warheads arrived in the port of Mariel. This was the start of the missile crisis that brought the world to the edge of nuclear holocaust.
October 14: U.S. confirmed the Soviet Union had installed offensive missiles in Cuba.
October 23: U.S. President John F. Kennedy ordered U.S. naval forces to quarantine Cuba.
October 28: Soviet President Nikita Khrushchev and President Kennedy reached an agreement to end the crisis. The Soviet Union would remove offensive missiles from Cuba while the United States promised not to invade Cuba and to prevent Cuban exiles from attacking the island.
November 20: The missile crisis ended. The Soviet government agreed to withdraw the Ilushin-28 bombers from Cuba.
December 23-24: Bay of Pigs Brigade 2506 prisoners in Cuba arrived in the U.S. after months of negotiations with the Cuban government. The price for their release was $53 million.
December 30: President Kennedy met with returning Brigade prisoners at the Orange Bowl in Miami Florida and received the Brigade’s flag with a promise to return it in a free Cuba.
Cuba officially became a one-party state. It was the Cuban Communist Party.
In October, Castro opened port of Camarioca for exiles to go and pick up family and friends.
President Lyndon Johnson approved for freedom flights to replace boats to make the migration from Cuba orderly. The flights began in December.
On November 2, 1966, The U.S. Congress passed Public Law 89-732, “The Cuban Adjustment Act,” commonly known in Spanish as “Ley de Ajuste Cubano”.
October 9: Ché Guevara was killed in Bolivia.