Карсская область
In 1878, after the Russo-Turkish War (1877–1878), the region was incorporated into the Russian Empire, and until 1918 was known as Kars Oblast. Northern part of the province is Democratic Republic of Georgia from 1918 to 1921 and southern part of the province is Democratic Republic of Armenia from 1918 to 1920, Ardahan was reclaimed by Turkey under the Treaty of Kars in 1921.