1861 CE
Britain annexes Lagos
British Empire · Colonization & sovereignty · Companies, trade & extraction · Slavery & coerced labor · Law & imperial government
Under naval pressure, Oba Dosunmu signed a treaty ceding Lagos to the Crown. British officials invoked suppression of the slave trade and commercial security while taking control of a crucial Yoruba port and opening a route inland that culminated in colonial Nigeria
Precision, calendar, and review
- Start
- year · no uncertainty qualifier in this record
- Calendar and convention
- Historical-era years; the source calendar is not identified. No conversion of days is assumed.
- Year zero
- The scale goes from 1 BCE to 1 CE without year zero. Changing era names changes labels only.
- Documentary review
- Date not recorded
Reading the date: point event.
Sources
- discovery.nationalarchives.gov.uk (opens in a new tab)
Source provenance and scope
- Publication date
- Pending verification: the source could not be accessed
- Bibliographic date checked
- 2026-09-23
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