Declaration of war by the United Kingdom
The United Kingdom formally declares war on Russia
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Original prompt & settings (JSON) ↗The listing is one day early. Parliament heard Victoria's war message on 27 March; the declaration itself was dated and published in The London Gazette the following day.
Two official steps, one day apart
The date attached to this event, 27 March 1854, belongs to a different act. That day Lord Aberdeen delivered Queen Victoria's message to the House of Lords, announcing that negotiation had ended and that Britain would give the Ottoman sultan active assistance.
Britain's formal declaration against Russia was dated and published on 28 March 1854, in a supplement to The London Gazette. Some histories call the 27 March message the practical declaration; for an event described specifically as the United Kingdom's formal declaration of war, 28 March is the stronger date.
What the Gazette actually published
The declaration said Russia had persisted in aggression against the Ottoman Empire, had rejected terms supported by four European powers, and threatened Ottoman independence. Britain framed its intervention as assistance to the sultan and as a defence of the European balance against Russian encroachment.
A companion declaration set out policy toward neutral commerce: Britain would generally spare enemy goods carried in neutral vessels, and neutral goods aboard enemy ships, unless contraband was involved. It added that Britain did not then intend to commission privateers through letters of marque.
The ultimatum Nicholas I left unanswered
Britain and France had demanded that Russia promise to evacuate Moldavia and Wallachia by 30 April. Nicholas I did not reject the demand with a counterproposal; he declined to answer it within the six days allowed, after which the British government concluded that negotiation had failed.
Britain had already been sending fleets and troops eastward, so the declaration changed legal belligerent status rather than beginning military preparation. Reprisals were authorised by an Order in Council on 29 March, and the first Anglo-French troops landed at Gallipoli within days.
Sources
Researched 24 Aug 2026 6 sources not yet audited Date corrected
How this was checked
Researched from the web into a fact sheet and rewritten from that sheet. This article has not yet had an independent model audit. How the pipeline works →
Date corrected. The research places this at 1854-03-28.
What the sources leave uncertain
- March 27 and March 28 represent two distinct official steps. On March 27, Victoria's message told Parliament that negotiations had ended and Britain would give the sultan “active Assistance.” The formal declaration of war was issued and published on March 28.
- Some histories call the March 27 message the practical declaration. For a dated event explicitly described as the United Kingdom's formal declaration of war, March 28 is the stronger date.