On December 19, 1949, Colonel Adib al-Shishakli led Syria's third coup of that year, the so-called Colonels' movement, arresting army chief of staff Sami al-Hinnawi and breaking the momentum toward a union between Syria and Hashemite Iraq. Shishakli, who had taken part in both earlier 1949 coups, mobilized armored units into Damascus before dawn, seized government buildings and the radio station, surrounded the presidential residence, and detained Hinnawi and his allies. Crucially, Shishakli did not remove the civilian president Hashim al-Atassi or the prime minister; instead he installed himself as the power behind the scenes through a Council of Colonels, beginning a period of dual rule in which a civilian government coexisted with military control.
This arrangement lasted until Shishakli launched a second, more sweeping coup in November 1951.
Researched Details
Researched
Independent research, added record by record. Hover any label for what it means.
Target identified in Coup Atlas research: Sami al-Hinnawi, army chief of staff and de facto power in Syria (arrested; President Atassi kept in place)
RESEARCHED NAME
Key figures
Sami al-Hinnawi (army chief of staff, arrested)
Adib al-Shishakli (coup leader, became power behind the scenes)
Hashim al-Atassi (civilian president, kept in office)
Sources
The December 1949 Syrian coup, also known as the Colonels' movement, took place on 19 December 1949, the third and final military takeover in Syria that year, led by Colonel Adib Shishakli, ending the four-month rule of Sami al-Hinnawi.
Shishakli notably did not remove Syria's civilian government, keeping the president and prime minister in power, and created a Council of Colonels to exert influence over governance, beginning a period of dual rule.
Around 5:30 a.m. on 19 December armored vehicles advanced on Damascus, took over government buildings, a bank, and a radio station, surrounded President Atassi's house, and after a brief battle detained Hinnawi and several associated officers.
On 19 December 1949 Colonel Adib Shishakli arrested Hinnawi and accused him of conspiring with a foreign power, Iraq, against Syrian interests, while the civilian politicians were left to try to stabilize the government.
The Cline dataset codes this event on 14 December 1949; all sources reviewed place the coup on 19 December 1949, so the dataset date is a few days early. This coup arrested the army chief (Hinnawi) but kept President Atassi in office, which matches the dataset's leader fate of 'placed under house arrest' referring to Hinnawi rather than a change of head of state. Three encyclopedic sources were read directly and agree on date, actors, and the dual-rule outcome.
Cross-Reference
Only one dataset carries it. One of the three reference datasets we check against carries this event; the others do not list it. That is not a contradiction — the datasets cover different periods and use different thresholds — but it means the record has had less outside corroboration.
Identifiers for finding this same event in the other datasets:
Coup Atlas research identifies the target as: Sami al-Hinnawi, army chief of staff and de facto power in Syria (arrested; President Atassi kept in place).
Baseline coding: Incumbent executive removed from power. Recorded leader fate: deposed; placed under house arrest. 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
“New Coup in Syria Ousts Army Chief,” by Albion Ross, December 20, 1949
“New Syria Cabinet Ends Week’s Crisis,” December 25, 1949
“Assassins Murder Syrian general who engineered cup last year,” October 31, 1950
“Syrian Army Deposes Shisekly,” February 26, 1954
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 →