Caucasus Army (Russian Empire, 1914–1917) in the context of "Caucasus campaign"

The Caucasus campaign comprised armed conflicts between the Russian Empire and the Ottoman Empire, later including Armenia, Azerbaijan, Georgia, the Mountainous Republic of the Northern Caucasus, the German Empire, the Central Caspian Dictatorship, and the British Empire, as part of the Middle Eastern theatre during World War I. The Caucasus campaign extended from the South Caucasus to the Armenian Highlands region, reaching as far as Trabzon, Bitlis, Mush and Van. The land warfare was accompanied by naval engagements in the Black Sea.

The Russian military campaign started on 1 November 1914 with the Russian invasion of Turkish Armenia. In February 1917, the Russian advance was halted following the Russian Revolution. The Russian Caucasus Army soon disintegrated and was replaced by the forces of the newly established Transcaucasian state, comprising partly of Armenian volunteer units and irregular units which had previously been part of the Russian Army. During 1918 the region also saw the establishment of the Central Caspian Dictatorship, the Republic of Mountainous Armenia and an Allied intervention force, nicknamed Dunsterforce, composed of troops drawn from the Mesopotamian and Western Fronts.