Crimean War
The Crimean War was fought between the Russian Empire and an alliance of the Ottoman Empire, France, the United Kingdom, and the Kingdom of Sardinia from October 1853 to February 1856. Geopolitical causes of the war included the Eastern question (the decline of the Ottoman Empire), expansion of Imperial Russia in the preceding Russo-Turkish wars, and the British and French preference to preserve the Ottoman Empire to maintain the balance of power in the Concert of Europe.