Timeline of United States military operations communist attack on a U.S. installation in central Vietnam, the United States escalated its participation in the war to a peak of 543,000 military personnel by April 1969. 1961: Cuba: The Bay of Pigs Invasion, known in Hispanic America as Invasión de Bahía de Cochinos (or Invasión de Playa Girón or Batalla de Girón), was an unsuccessful military invasion of Cuba undertaken by the CIA-sponsored paramilitary group Brigade 2506 on April 17, 1961. 1962: Thailand: The Third Marine Expeditionary Unit landed on May 17, 1962 to support that country during the threat of Communist pressure from outside; by July 30,
CIA activities in Nicaragua government eventually grew stronger and British influence faded. Background Information and the Precipitation of the Contra Conflict In 1961, the Frente Sandinista de Liberacion Nacional (FSLN) was founded in Havana, Cuba. The development of the FSLN represented the merger of "Carlos Fonseca's Nicaraguan Patriotic Youth organization ... with Tomas Borge's Cuban-supported insurgent group." The FSLN remained a largely unsuccessful and marginal political movement until 1972, when an earthquake rocked the Nicaraguan capital, Managua. The Somoza government, which had assumed control of Nicaragua shortly following the withdrawal of United States military personnel in 1933, was seen to be profiteering from international