Treaty of Cession of Lagos
E1047162
The Treaty of Cession of Lagos was an 1861 agreement by which the Oba of Lagos ceded sovereignty over Lagos to the British Crown, paving the way for formal colonial rule in the region.
All labels observed (2)
| Label | Occurrences |
|---|---|
| British annexation of Lagos | 1 |
| Treaty of Cession of Lagos canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13565352 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Treaty of Cession of Lagos Context triple: [Lagos Colony, establishedThrough, Treaty of Cession of Lagos]
-
A.
Treaty of Lagos
The Treaty of Lagos is the 1975 agreement that established the Economic Community of West African States (ECOWAS) as a regional organization for economic integration and cooperation in West Africa.
-
B.
Treaties of Benin
Treaties of Benin are formal international agreements concluded by the Republic of Benin with other states or entities, governing various political, legal, and diplomatic relations.
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C.
Anglo-Dutch Gold Coast Treaty of 1871
The Anglo-Dutch Gold Coast Treaty of 1871 was an agreement between Britain and the Netherlands that transferred Dutch possessions on the Gold Coast to British control, consolidating British colonial rule in what is now Ghana.
-
D.
Abuja Treaty
The Abuja Treaty is a 1991 African Union founding agreement that laid out the roadmap for creating an African Economic Community through progressive regional integration and economic cooperation among African states.
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E.
Treaty of 23 December 1865
The Treaty of 23 December 1865 was the international agreement through which several European states standardized their coinage systems, laying the foundation for the Latin Monetary Union.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Treaty of Cession of Lagos Target entity description: The Treaty of Cession of Lagos was an 1861 agreement by which the Oba of Lagos ceded sovereignty over Lagos to the British Crown, paving the way for formal colonial rule in the region.
-
A.
Treaty of Lagos
The Treaty of Lagos is the 1975 agreement that established the Economic Community of West African States (ECOWAS) as a regional organization for economic integration and cooperation in West Africa.
-
B.
Treaties of Benin
Treaties of Benin are formal international agreements concluded by the Republic of Benin with other states or entities, governing various political, legal, and diplomatic relations.
-
C.
Anglo-Dutch Gold Coast Treaty of 1871
The Anglo-Dutch Gold Coast Treaty of 1871 was an agreement between Britain and the Netherlands that transferred Dutch possessions on the Gold Coast to British control, consolidating British colonial rule in what is now Ghana.
-
D.
Abuja Treaty
The Abuja Treaty is a 1991 African Union founding agreement that laid out the roadmap for creating an African Economic Community through progressive regional integration and economic cooperation among African states.
-
E.
Treaty of 23 December 1865
The Treaty of 23 December 1865 was the international agreement through which several European states standardized their coinage systems, laying the foundation for the Latin Monetary Union.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
colonial treaty
ⓘ
historical document ⓘ treaty ⓘ |
| appliesToTerritory |
Lagos
ⓘ
Lagos Island ⓘ Lagos Lagoon area ⓘ |
| chronologyPosition | early phase of British rule in what became Nigeria ⓘ |
| consequence |
integration of Lagos into the British colonial economy
ⓘ
introduction of formal British colonial administration in Lagos ⓘ reduction of Oba of Lagos’s political authority ⓘ |
| country |
Lagos
ⓘ
United Kingdom ⓘ |
| dateSigned | 1861-08-06 ⓘ |
| follows |
British bombardment of Lagos in 1851
ⓘ
British occupation of Lagos in the 1850s ⓘ |
| hasEffectOn |
Yoruba polities in the Lagos area
ⓘ
trans-Atlantic trade in Lagos ⓘ |
| hasHistoricalSignificance | marked the beginning of formal British colonial rule in present-day Nigeria ⓘ |
| language | English ⓘ |
| legalStatus | instrument of cession ⓘ |
| motivation |
British desire to control trade routes in the Bight of Benin
ⓘ
British policy against the Atlantic slave trade ⓘ |
| partOf |
British Empire in Africa
ⓘ
history of Lagos ⓘ history of Nigeria ⓘ |
| placeSigned |
Lagos
ⓘ
Lagos Island ⓘ |
| region |
Bight of Benin
ⓘ
West Africa ⓘ |
| relatedTo |
British colonial expansion in West Africa
ⓘ
abolition of the slave trade ⓘ formation of the Colony and Protectorate of Nigeria ⓘ |
| result |
cession of Lagos to the British Crown
ⓘ
creation of the Colony of Lagos ⓘ establishment of British colonial rule in Lagos ⓘ transfer of sovereignty over Lagos to Britain ⓘ |
| signatory |
British Crown
ⓘ
Oba Dosunmu ⓘ Oba of Lagos ⓘ |
| signedByRepresentativeOf |
British government
ⓘ
Lagos monarchy ⓘ Queen Victoria ⓘ |
| subject |
cession of territory
ⓘ
colonial administration ⓘ sovereignty over Lagos ⓘ |
| timePeriod | 19th century ⓘ |
| yearSigned | 1861 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Treaty of Cession of Lagos Description of subject: The Treaty of Cession of Lagos was an 1861 agreement by which the Oba of Lagos ceded sovereignty over Lagos to the British Crown, paving the way for formal colonial rule in the region.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Treaty of Cession of Lagos