Episode 1 of 2

British Declaration of War

When: 27 March 1854
Where: London
Part of: United Kingdom and France declare war on Russia, beginning their Crimean War intervention

Britain declared war on Russia on 27 March 1854, following the rejection of an ultimatum to withdraw from the Danubian Principalities.

The United Kingdom issued its declaration on 27 March 1854. This action followed the Anglo-French demand for Russian withdrawal from the principalities on 27 February. Russia's refusal to comply with the ultimatum necessitated the formal entry into the war, aligning Britain with the Ottoman Empire.

Sources

Crimean War Wikipedia, revision of 2026-10-04

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.