On March 11, 1966 President Sukarno of Indonesia, cornered by the army and mass student protests, signed the Supersemar decree handing army commander General Suharto authority to take whatever measures he deemed necessary to restore order, the pivotal transfer that effectively ended Sukarno's rule and began Suharto's New Order. The document followed months of upheaval after the September 30, 1965 killing of six army generals, blamed on the Communist Party (PKI), and the mass anti-communist killings that left an estimated half a million or more dead. On March 11 unidentified troops surrounded the presidential palace during a cabinet meeting; Sukarno fled by helicopter to Bogor, where three pro-Suharto generals secured his signature on the decree.
The next day Suharto used it to ban the PKI, and days later arrested fifteen Sukarno loyalist ministers. Over the following year he reshaped the provisional assembly, which in March 1967 stripped Sukarno of power and named Suharto acting president.
Researched Details
Researched
Independent research, added record by record. Hover any label for what it means.
Target identified in Coup Atlas research: President Sukarno, sidelined by the March 11, 1966 Supersemar transfer and reduced to a figurehead before being formally stripped of power in March 1967; he was placed under virtual house arrest until his death in 1970, and was not physically harmed.
RESEARCHED NAME
Key figures
Sukarno (president sidelined by the decree)
Suharto (army commander who received and used the authority)
Basuki Rahmat, M. Jusuf, and Amir Machmud (generals who secured Sukarno's signature)
Sources
The Order of Eleventh March, Supersemar, was a document signed by President Sukarno on 11 March 1966 giving army commander Lt. Gen. Suharto authority to take whatever measures he deemed necessary to restore order; Suharto used the powers to ban the PKI the next day, and on 18 March fifteen Sukarno loyalist ministers were arrested, after which he changed the composition of the provisional assembly, which in March 1967 stripped Sukarno of his powers and appointed Suharto acting president.
During a cabinet meeting on 11 March 1966, while army protected student demonstrations took place in Jakarta, troops without insignia surrounded the presidential palace; Sukarno was advised to leave and flew to Bogor by helicopter, where later that night he signed the Supersemar document transferring authority to restore order to Suharto, who on 12 March ordered a nationwide ban on the PKI.
SOURCE REVIEWEDWikipedia, Transition to the New Orderopen source ↗
A contemporary history summary records that on March 12, 1966, following nearly three weeks of student riots, President Sukarno transferred to Suharto the authority to take, in the president's name, all measures required for the safekeeping and stability of the government administration, and that Sukarno's power dissolved slowly thereafter, kept under virtual house arrest until his death in June 1970.
SOURCE REVIEWEDFacts and Details, Coup of 1965 and the Fall of Sukarnoopen source ↗
An Indonesian account records that the Supersemar marked the transfer of executive power from Sukarno to Suharto and the start of the New Order, that Sukarno reluctantly signed it at the insistence of the army amid chaos, that Suharto banned the PKI the following day, and that within two years Suharto had gained all power and become Indonesia's second president.
SOURCE REVIEWEDIndonesia Investments, Today in Indonesian History: Supersemaropen source ↗
Editorial Note
Date nuance: the dataset codes 1966-03-12, the day Suharto first used the transferred authority (banning the PKI); the decree itself was signed on 11 March 1966. Both dates are documented and the one day gap is explained here rather than treated as an error. Coding note: this is a gradual, document mediated transfer rather than a violent seizure, which is why the deposed leader's not physically harmed fate holds; Sukarno remained nominal president until March 1967 and was then held under house arrest until his 1970 death, recorded here. The surrounding 1965 to 1966 mass killings (estimated 500,000 or more) are noted as context, not attributed to this specific transfer event.
Cross-Reference
Datasets agree. At least two of the three reference datasets we check against carry this event, and none of them disagrees about its date or its result.
Identifiers for finding this same event in the other datasets:
Coup Atlas research identifies the target as: President Sukarno, sidelined by the March 11, 1966 Supersemar transfer and reduced to a figurehead before being formally stripped of power in March 1967; he was placed under virtual house arrest until his death in 1970, and was not physically harmed..
Baseline coding: Incumbent executive removed from power. Recorded leader fate: deposed; not physically harmed. The baseline file does not name individual targets; researched names are kept in a separate layer.
Baseline Dataset Citation
Cline Center Coup d’État Project Dataset, v2.2.2
Peyton, Buddy, Joseph Bajjalieh, Michael Martin, and Andrea Gerald. 2026. Cline Center Coup d’État Project Dataset. Cline Center for Advanced Social Research. V.2.2.2. February 17. University of Illinois Urbana-Champaign. doi: 10.13012/B2IDB-9651987_V10
“Sukarno Yields Power to Army to Curb Unrest; Communist Party Banned,” March 12, 1966
“Military Chiefs Ignore Sukarno,” March 24, 1966
This is the citation trail carried by the baseline dataset, grouped by outlet and rejoined from the line-wrapped original. Coup Atlas has not independently re-checked every document; read the original before citing a specific claim. URLs the import damaged beyond safe repair are shown as plain text and listed in citations-report.md. How this list is built →