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 the Philippines CIA recognized Philippine concern over a Huk resurgence in the region after killings on the island of Luzon, where Manila is located. The armed forces were called in fear of a communist uprising, but most of the fears went unwarranted at the time. While the Huk resurged in the 1960s, they were not able to cause an insurrection like that of their earlier attempt again. While they did not believe they posed too large of a threat, there was concern that "any failure by Marcos to reduce Huk influence could" cost him the election. In 1966 the CIA was concerned