1853-56 Crimean War
The Crimean War was a military conflict fought from October 1853 to March 1856 in which the Russian Empire lost to an alliance of France, Britain, the Ottoman Empire and Sardinia. The immediate cause involved the rights of Christian minorities in the Holy Land, which was a part of the Ottoman Empire. The French promoted the rights of Roman Catholics, while Russia promoted those of the Eastern Orthodox Church. The longer-term causes involved the decline of the Ottoman Empire and the unwillingness of Britain and France to allow Russia to gain territory and power at Ottoman expense.