Operation 40 necessary some of your own members who were suspected of being foreign agents...We were concentrating strictly in Cuba at that particular time." The group sought to incite civil war in Cuba against the government of prime minister Fidel Castro. "In October 1960, they realize that this project has failed, and that is when Brigade 2506" was created, a CIA-sponsored group made up of 1,511 Cuban exiles who fought in the April 1961 Bay of Pigs Invasion. On 17 April 1961, Vicente Leon Leon, with other members of Operation 40, landed at the Bay of Pigs via the CIA-chartered freighter "Atlantico".
Fidel Castro model of rule, with a one-party state, government control of trade unions, suppression of civil liberties, and the absence of freedom of speech and press. In January 1961, Castro ordered Havana's U.S. Embassy to reduce its 300-member staff, suspecting that many of them were spies. The U.S. responded by ending diplomatic relations, and it increased CIA funding for exiled dissidents; these militants began attacking ships that traded with Cuba, and bombed factories, shops, and sugar mills. Both Eisenhower and his successor John F. Kennedy supported a CIA plan to aid a dissident militia, the Democratic Revolutionary Front, to invade Cuba