The Siege of Kars was the last major operation of the Crimean War. In June 1855, attempting to alleviate pressure on the defence of Sevastopol, Emperor Alexander II ordered General Nikolay Muravyov to lead his troops against areas of Ottoman interest in Asia Minor. Uniting disparate contingents under his command into a strong corps of 25,000 soldiers and 88 light guns, Muravyov decided to attack Kars, the most important fortress of Eastern Anatolia.