President of the United States Lyndon B. Johnson nominated Green as United States Ambassador to Indonesia on June 4 , 1965 , and Green presented his credentials to the Indonesian government on July 26 , 1965 . He was met with an anti-Vietnam War protest organized by Sukarno , the President of Indonesia , under the slogan " Go Home , Green " . Only weeks later , Green witnessed first hand the Transition to the New Order , an anti-communist purge in which Suharto led a coup against Sukarno following the murder of six generals by the 30 September Movement , which was blamed on the PKI by the Indonesian military based on dubious evidence . Green supported the Indonesian Army 's version of the events , but contemporary historians have challenged it , with historian Geoffrey B. Robinson of UCLA in particular noting that Green and other US officials involved in supporting the Suharto coup " published memoirs and articles that sought to divert attention from any possible US role , while questioning the integrity and political loyalties of scholars who disagreed with them . " An estimated 500,000 to one million Indonesians were killed in the massacres that followed . Recent revelations from government archives confirm that Green himself endorsed the Indonesian military " destroying PKI " through executions , noting in an October 20 , 1965 telegram that he had " increasing respect for its determination and organization in carrying out this crucial assignment . " According to Mark Aarons , he is " seen as one of the principal officials involved in encouraging the slaughter . " Green was Ambassador to Indonesia until March 26 , 1969 ; during his four years in Indonesia , he practiced what he called " low-profile diplomacy "
500,000 to one million Indonesians were killed
Indonesian mass killings of 1965–66
Marshall Green