Padang, Pariaman, Silungkang, Sawah Lunto, Alahan Panjang, and Suliki of West Sumatra have been cited as an area which was particular active in communism.
[2] Backed by the Communist International (Comintern) in Moscow, the PKI became active among trade unionists and rural villagers in Sumatra.
[4] Incidentally, Hadji Abdullah Ahmad, a noted anti-communist and religious leader was from the Minangkabau Highlands, where communism was active.
[5] Numerous examples of anti-communist resentment also occurred, for instance during the Indonesian killings of 1965–1966, PKI-organised squatters' movements and campaigns against foreign businesses in Sumatra's plantations provoked quick reprisals against Communists.
[12] When a provincial DPRD (council) for Aceh was appointed by the Minister of Home Affairs in January 1957, PKI was allocated one out of thirty seats.
Reports emerged from Aceh that thousands were killed in the massacres, in which entire families of alleged PKI sympathizers along with their domestic servants were annihilated.
[16] An all-Acehnese conference ulema and military officers held December 15–16, 1965 issued a fatwa stating that any Muslim that died in combat with PKI would be considered a martyr.