A map of the Russian-Turkish front from Der Weltkrieg 1914-1918, a 1930s German history of the war illustrated with hand-pasted cigarette cards, showing the Turkish Empire in Asia Minor and Mesopotamia, the Mediterranean, Black, and Caspian Seas and the Persian Gulf. To the west is Egypt, a British dominion; to the east Persia. Erzerum in Turkey and Kars in Russia were the great fortresses on the frontier.