History of São Tomé and Príncipe independence

History: São Tomé and Príncipe

From the Algiers negotiations through a transitional government to independence and UN membership.

1 min read

Published

24 September 2026

Status verified as of

18 September 2026

The 1953 Batepá massacre

On 3 February 1953, following a dispute over forced contract labour, Portuguese colonial militias and administration killed forros (native Creoles) on São Tomé over the following days; the death toll is uncertain, with estimates ranging from hundreds to roughly 2,000. The episode fed later nationalist sentiment.[1]

3 February 1953 · Conflict episode

Batepá massacre, 1953

On 3 February 1953, Portuguese colonial militias and administration killed forros (native Creoles) on São Tomé following a dispute over forced contract labour; the death toll is uncertain, with estimates ranging from hundreds to roughly 2,000.

The MLSTP and the Algiers negotiations

The Committee for the Liberation of São Tomé and Príncipe formed in exile around 1960 and was renamed the MLSTP in 1972. Following Portugal's April 1974 revolution, Portugal and the MLSTP signed the Algiers Agreement on 25 November 1974, recognising the MLSTP as the sole legitimate representative of the people and providing for a transitional government and constituent assembly elections.[2] After that transition, São Tomé and Príncipe became independent on 12 July 1975, with MLSTP Secretary General Manuel Pinto da Costa as first President.[3]

12 July 1975 · Declaration

Independence of São Tomé and Príncipe, 1975

São Tomé and Príncipe became independent from Portugal on 12 July 1975, following negotiations in Algiers between Portugal and the MLSTP and a period of transitional government; MLSTP Secretary General Manuel Pinto da Costa became the country's first President.

United Nations membership

The Security Council unanimously recommended UN membership on 18 August 1975, and the General Assembly admitted the Democratic Republic of Sao Tome and Principe on 16 September 1975.[4][5]

16 September 1975 · Recognition

Admission of São Tomé and Príncipe to the United Nations, 1975

Following the Security Council's unanimous recommendation, the General Assembly admitted the Democratic Republic of Sao Tome and Principe as a member of the United Nations.

Sources for this page

Each number marks a specific claim. Notes give the source, its locator and how it relates to the claim.

Claim: On 3 February 1953, following a dispute over forced contract labour, Portuguese colonial militias and administration killed forros (native Creoles) on São Tomé over the following days; the death toll is not established with certainty, and published estimates range from hundreds to as many as roughly 2,000.

Batepá massacre (Wikipedia) link, Massacre and Death toll sections. Source record

Claim: The Committee for the Liberation of São Tomé and Príncipe formed in exile around 1960 and was renamed the Movimento de Libertação de São Tomé e Príncipe (MLSTP) in 1972. On 25 November 1974, Portugal and the MLSTP signed the Algiers Agreement, recognising the MLSTP as the sole legitimate representative of the people and providing for colonial rule to end via a transitional government and elections to a constituent assembly.

History of São Tomé and Príncipe (Wikipedia) link, Nationalist movements and Independence sections. Source record

Claim: Following negotiations between Portugal and the MLSTP at Algiers in November 1974 and a period of transitional government, São Tomé and Príncipe became independent from Portugal on 12 July 1975, with MLSTP Secretary General Manuel Pinto da Costa becoming the country's first President.

Shillington, Kevin, Encyclopedia of African History (Fitzroy Dearborn, 2005) , São Tomé and Príncipe entry. Source record

Claim: On 18 August 1975 the Security Council, having examined the application for UN membership, unanimously recommended to the General Assembly that the Democratic Republic of Sao Tome and Principe be admitted.

United Nations Security Council, Security Council resolution 373 (1975) (United Nations, 18 August 1975) link, operative paragraph. Source record

Claim: The UN General Assembly decided to admit the Democratic Republic of Sao Tome and Principe to membership in the United Nations at its 2351st plenary meeting on 16 September 1975, following the Security Council's recommendation of 18 August 1975.

United Nations General Assembly, General Assembly resolution 3364 (XXX): Admission of the Democratic Republic of Sao Tome and Principe to membership in the United Nations (United Nations, 16 September 1975) link, operative paragraph and meeting note. Source record