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 25,725 soldiers, 96 light guns, Muravyov decided to attack Kars, the most important fortress of Eastern Anatolia.

Kars is a city in northeast Turkey. It is the seat of Kars Province and Kars District. As of 2022, its population was 91,450. Kars, in classical historiography (Strabo), was in the ancient region known as Chorzene, part of the province of Ayrarat in the Kingdom of Armenia, and later the capital of the Bagratid Kingdom of Armenia from 929 to 961. Currently, the mayor of Kars is Türker Öksüz. The city had an Armenian ethnic majority until it was re-captured by Turkish nationalist forces in late 1920.