March 28
Britain and France Declare War on Russia
Britain and France declared war on Russia on successive days in late March 1854, converting a Russo-Ottoman dispute into a wider European conflict centered on the Black Sea and the Crimea.
Summary
Tensions over influence in the Ottoman Empire and the Eastern Question escalated after Russia's victory at the Battle of Sinop in late 1853. Britain and France, seeking to curb Russian expansion and protect their strategic interests in the Black Sea region, issued an ultimatum that Russia ignored. On March 28, 1854, Britain formally declared war, with France following suit shortly thereafter. This alliance with the Ottoman Empire and later Sardinia transformed a regional conflict into a broader European war. The declarations committed major powers to a prolonged campaign focused on the Crimean Peninsula. Naval and land operations soon followed.
Context
The Eastern Question preoccupied European statesmen as the Ottoman Empire's long decline raised fears of instability along its borders. Russia under Tsar Nicholas I claimed a special role as protector of Orthodox Christians living under Ottoman rule, a stance that overlapped with ambitions for greater influence in the Balkans and access through the Black Sea straits. France, restored to imperial rule under Napoleon III, challenged Russian pretensions in the Holy Places of Palestine to bolster its own Catholic credentials and international standing.
What Happened
Tensions boiled over after Russian forces occupied the Danubian Principalities in July 1853. The Ottomans declared war in October, but the naval engagement at Sinop the following month, in which a Russian squadron destroyed an anchored Ottoman fleet, hardened Western opinion. Britain and France sent their own fleets into the Black Sea in early January 1854 to shield Ottoman shipping and issued an ultimatum demanding Russian withdrawal from the principalities.
Russia ignored the deadline. France declared war on 27 March 1854; Britain followed on 28 March. The two powers now stood openly alongside the Ottoman Empire, committing naval resources and preparing ground forces for operations against Russian positions in the Black Sea theater.
Aftermath
Russia evacuated the Danubian Principalities to forestall Austrian intervention, allowing Austria to occupy the region later in 1854. Allied commanders assembled an expeditionary force that landed on the Crimean Peninsula in September, initiating a prolonged siege of the Russian naval base at Sevastopol and a series of hard-fought battles on the surrounding heights.
Legacy
The war ended with the Treaty of Paris in 1856, which barred Russian warships from the Black Sea and underscored the limits of the Concert of Europe. Military shortcomings exposed during the campaign prompted sweeping reforms in Russia under Tsar Alexander II, while the conflict's reporting and medical innovations, notably Florence Nightingale's work, influenced later practices in warfare and public health.
Why It Matters
The March 28 declarations launched the Crimean War, which exposed weaknesses in Russian military organization and led to significant reforms under Tsar Alexander II. It also shaped modern international alliances and diplomacy, contributing to the decline of the Concert of Europe system. The conflict's outcome influenced later European power balances and the Eastern Question.
Related Questions
Why did Britain and France enter the war on the Ottoman side?
They feared unchecked Russian expansion in the Black Sea region would upset the European balance of power and threaten their own strategic and commercial interests.
What role did the Battle of Sinop play in the declarations?
The Russian destruction of an Ottoman squadron at Sinop in November 1853 outraged public opinion in Britain and France and provided the immediate casus belli for intervention.
How quickly did fighting begin after the declarations?
Allied forces spent the spring and summer of 1854 preparing an expeditionary force that landed in the Crimea in September and opened the siege of Sevastopol.
Did Austria join the war against Russia?
Austria remained neutral but occupied the Danubian Principalities after Russia withdrew, exerting diplomatic pressure that helped isolate Russia.
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US Military Atlas: Britain and France Declare War on Russia connects to military history, war consequences, or postwar diplomacy.
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Sources
- Crimean War - Britannica, Encyclopædia Britannica. Accessed 2026-07-09.
- Crimean War - Wikipedia, Wikimedia Foundation. Accessed 2026-07-09.