The Armenian-Azerbaijani war, which starts after the Russian Revolution, refers to a series of brutal and hard to classify conflicts in 1918, then from 1920 to 1922, that occur during the brief independence of Armenia and Azerbaijan and afterward.

Most of the conflicts do not have a principal pattern with a standard armed structure.

The Ottoman Empire and British Empire are involved in different capacities: the Ottoman Empire leaves the region after the Armistice of Mudros but British influence continues until Dunsterforce is pulled back in 1920s.

The conflicts involve civilians in the disputed districts of Kazakh-Shamshadin, Zanghezur, Nakhichevan and Karabakh.

The use of guerrilla and semi-guerrilla operations are the main reasons for the high civilian casualties, which occur during the nation-building activities of the newly established states.

The reasons behind the conflict are still far from being resolved after nearly a century.The story of this campaign has very different perceptions; according to Armenian historians, the Democratic Republic of Armenia aimed to include Nakhichevan among the basic (Eastern Armenian) territories of Yerevan province, as well as the eastern and southern parts of Elisavetpol (present-day Ganja) province.