British Ultimatum to Portugal
- When
- 1890
- Where
- London
- Episodes
- 1
On 11 January 1890, Lord Salisbury issued a memorandum demanding Portugal withdraw troops from Mashonaland, Matabeleland, and the Shire-Nyasa region. This ultimatum followed a crisis involving British pressure from Cecil Rhodes and missionaries, a refusal of arbitration, and a minor armed clash near the Shire river in late 1889.
Episodes
Background and detail
Background. Portuguese efforts to secure treaties with Yao chiefs in 1888 alarmed the British government. Lord Salisbury, pressured by Cecil Rhodes' British South Africa Company and missionaries, refused arbitration. A minor battle between Portuguese troops and the Makololo in November 1889, followed by a unilateral British protectorate declaration in December, formed the immediate background to the crisis.
Diplomatic Context. The British government appointed Henry Hamilton Johnston as consul in 1889 to monitor Portuguese rule. Despite Portuguese proposals to abandon claims linking Angola and Mozambique, Britain refused arbitration. The ultimatum demanded withdrawal from areas where interests overlapped, specifically Mashonaland, Matabeleland, and the Shire-Nyasa region, setting the stage for the 1891 treaty.
People involved
- Lord Salisbury · British Prime Minister issuing the ultimatum
- Cecil Rhodes · Founder of British South Africa Company pressuring for action
- Serpa Pinto · Portuguese governor and military leader involved in clashes
- Barros Gomez · Portuguese Foreign Minister proposing territorial concessions
Sources
- 1890 British Ultimatum Wikipedia, revision of 2026-09-18
- Anglo-Portuguese Treaty of 1891 Wikipedia, revision of 2026-03-25
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.