jakarta u.s. government intimate knowledge mass kill allege communists indonesia mid 1960s even fail publicly reveal slaughter newly declassify u.s. document show.the document also reveal indonesian army intermediaries tell western embassies consider topple president sukarno less fortnight kill six general rebel military personnel spark bloodletting murder general sept. 30 1965 still widely depict attempt communist coup sukarno murder use pretext anti-communist pogrom indonesia military islamic group lead least 500,000 deaths one bad massacre 20th century kill 1965 1966 never officially investigate perpetrators never face justice indonesia world large muslim-majority country still periodic bouts anti-communist hysteria last month meet human right activists victims anti-communist purge shut islamists nationalists riot outside venue one cable u.s. embassy jakarta department state write three months members communist party pki first target say estimate 100,000 pki deaths medan island sumatra clerics muslim group muhammadiyah urge members kill communists accord telegram u.s. consul conscious pki members classify low order infidel shed whose blood comparable kill chicken consul say one report muhammadiyah youth group chairman dahnil anzar say document show nothing new conflict happen u.s. consular officer city surabaya east java say telegram members ansor youth wing nahdlatul ulama islamic organization responsible widespread slaughter think kill communists ticket heaven army quietly release nightly 10 15 prisoners muslims execution official surabaya say another dispatch abdul rochman secretary general ansor tell reuters group involvement kill 1965 form self-defense pki carry provocative activities like aggressive recruitment go insult imams poison kill members burn mosques say believe nu reaction relatively measure disproportionate indonesia chief security minister wiranto decline answer question army deputy chief staff siburian say see document could comment concern left-wing policies rochman nu ansor say support move dialogue reconciliation must make sure voice hear nu voice victims voice children suspect communists phelim kine deputy asia director human right watch say redress victims long overdue u.s. embassy respond request comment document solve mystery six general kill sept. 30 show unite state indonesian military ally deeply concern sukarno left-wing policies tie communists u.s. ambassador marshall green write oct. 12 1965 army approach western embassies intermediary say consider quick move overthrow sukarno although final decision make event coup green say unite state could help anything covert operations assistance transport money communications equipment arm january 1967 major general sjarif thajeb tell u.s. embassy official sukarno plan accuse foreigners little army friends orchestrate sept. 30 kill president plan galvanize military hawk oust sukarno march army general suharto become act president march usher three decades military dictatorship u.s. know indonesian anti-communist massacre unfold