The Arab Revolt which began in 1916 turned the tide against the Ottomans at the Middle Eastern front, where they initially seemed to have the upper hand during the first two years of the war. When the Armistice of Mudros was signed on 30 October 1918, the only parts of the Arabian peninsula that were still under Ottoman control were Yemen, Asir, the city of Medina, portions of northern Syria and portions of northern Iraq. These territories were handed over to the British forces on 23 January 1919. The Ottomans were also forced to evacuate the parts of the former Russian Empire in the Caucasus (in present-day Georgia, Armenia and Azerbaijan), which they had gained towards the end of World War I, following Russia's retreat from the war with the Russian Revolution in 1917.