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 Canada program was cancelled in 1959, many believed that the CIA was partly responsible, fearing Canadian intrusion into aerospace dominance. In 1961, the CIA wrote an intelligence estimate titled "Trends in Canadian Foreign Policy" which suggested that the Conservative government of John Diefenbaker "might take Canada in a divergent direction" and seek "a more independent foreign policy" and suggested that a return of the Liberal Party might "soften the Canadian resistance to the storage of nuclear weapons on Canadian soil". In 1967, Prime Minister Lester Pearson announced he would investigate the allegations of the CIA helping him oust Diefenbaker. In 1982,