Portugal (PRT)Southern Europe, EuropeSeptember 30, 1974
Event Summary
On September 30, 1974 General Antonio de Spinola resigned as president of Portugal, forced out by the revolutionary Armed Forces Movement after his attempt to rally a conservative silent majority against the leftward drift of the Carnation Revolution collapsed. Spinola, a senior general under the old Estado Novo who had called for a negotiated end to the colonial wars, had been installed as the first post-revolution president in May 1974 after the April 25 coup, but he clashed with the MFA over the pace of decolonization, favoring a federation of the colonies while the revolutionary captains wanted full and rapid independence, and over the revolution's sharp turn to the left. In a bid to reassert authority, he called on the maioria silenciosa (silent majority) to mobilize in a rally set for September 28, 1974; the MFA and left-wing organizations blocked the demonstration by erecting barricades and checkpoints around Lisbon.
With the rally thwarted and his authority spent, Spinola resigned on September 30 after roughly four months in office and was replaced by General Francisco da Costa Gomes. He was not physically harmed, matching the dataset fate. Spinola later backed a failed rightist counter-coup in March 1975 and fled abroad.
Researched Details
Researched
Independent research, added record by record. Hover any label for what it means.
Target identified in Coup Atlas research: President Antonio de Spinola, forced to resign on September 30, 1974 after the failure of his silent-majority rally; he was not physically harmed, and was replaced by General Costa Gomes.
RESEARCHED NAME
Key figures
Antonio de Spinola (president forced to resign)
The Armed Forces Movement (MFA, the revolutionary military body)
Francisco da Costa Gomes (general who replaced Spinola)
Sources
Spinola lasted as the first post-Revolution President from 15 May 1974 until 30 September of the same year, to be substituted by General Francisco da Costa Gomes; his resignation was partly due to what he saw as the profound move to the political left and its effects on the military and the independence of the Portuguese colonies, and he resigned when he realized he would not be able to block the application of the MFA program.
SOURCE REVIEWEDWikipedia, Antonio de Spinolaopen source ↗
Spinola determined to call on the silent majority against communism, a populist solution appealing to erstwhile right-wing supporters of Salazar, but his popular meeting advertised for September 28 was suddenly prohibited by the MFA, and powerfully opposed and unable to refrain from political involvement, Spinola resigned from the Presidency on September 30, 1974.
SOURCE REVIEWEDPortugal Resident, General Antonio de Spinolaopen source ↗
The Portuguese presidency's official biography records that Spinola occupied the Presidency of the Republic from 15 May to 30 September 1974, when he resigned and was replaced by General Costa Gomes, following the failed coup of the so-called silent majority on 28 September 1974.
SOURCE REVIEWEDPresidency of the Portuguese Republic, Antonio de Spinolaopen source ↗
The demonstration was stopped the day before when communists, socialists, and other left-wing militants erected barricades at the entrances to Lisbon and surveillance posts across the country, and the failed silent-majority coup ended with the resignation of General Spinola, after which the MFA was called upon to lead the revolution.
SOURCE REVIEWEDThe Communist / In Defence of Marxism, The Portuguese Revolution of 1974open source ↗
Editorial Note
Coding note: the dataset labels this a military coup and codes Spinola not physically harmed; it was a forced resignation in which the revolutionary MFA blocked his silent-majority rally and stripped him of effective authority, leading him to step down. He was replaced by his ally and chief Costa Gomes. Arc context: this is a stage within the Portuguese revolutionary process that began with the April 25, 1974 Carnation Revolution overthrowing the Caetano regime (a distinct dataset event); the September 30 resignation marked the defeat of the conservative wing and the revolution's leftward turn. Arc forward: Spinola backed the failed rightist counter-coup of March 11, 1975 and then fled abroad (to Spain and Brazil), a separate later event. Date nuance: the rally was blocked September 28 and Spinola resigned September 30 (the dataset's date).
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: President Antonio de Spinola, forced to resign on September 30, 1974 after the failure of his silent-majority rally; he was not physically harmed, and was replaced by General Costa Gomes..
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
“Army Chief Wins in Portugal Vote for President,” by Marvine Howe, June 28, 1976
Chicago Tribune
“Portugal’s Leftists Unseat Spinola,” October 1, 1974
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 →