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 Laos the PL into the larger Laotian society, the CIA had gained intelligence that the PL did not intend to abandon it's "radical" ideology and desire to overthrow the democratic government headed by the RLG. The CIA believed that the PL desired instead to establish a Communist government via subversive political and covert actions as opposed to overt military actions. Nevertheless, the CIA feared that the PL was more than willing to revert to the overt use of force if their new tactics were unsuccessful. An example of this subversion is demonstrated in the cable stating, "PL propagandists and terrorists continued