Before 1854 war was declared on Russia by the Ottomans and commenced in 1853 .
Having obtained promises of support from France and Britain , the Ottomans declared war on Russia in October 1854.The war started in the Balkans in July 1854 , when Russian troops occupied the Danubian Principalities ( part of modern Romania ) , which were under Ottoman suzerainty , then began to cross the Danube .
Crimean War