The Caucasus Campaign comprised armed conflicts between the Ottoman Empire and the Russian Empire, later including Azerbaijan, Armenia, 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 the Russian navy in the Black Sea Region of the Ottoman Empire. The Armenian Genocide is intertwined with the events of this campaign.