Shortly after the outbreak of World War I in 1914, the Ottoman Empire sided with Austria-Hungary and Germany, and its army numbered more than one million men after the mobilization. Although Sultan Turkey was then considered a "sick man on the Bosphorus", its armed forces went through several conflicts before the Great War (the Young Turks Revolution of 1908, the war with Italy on Libya in 1911, and the Balkan War in 1912-1913), which were valuable to them. source of knowledge. Although the Ottoman Empire lagged far behind its Western allies and opponents in industry and economics, its troops achieved remarkable success, the most important of which was the heroic and ingenious defense of access to the Sea of Marmara in 1915-1916, known as the Battle of Gallipoli, or the mighty 1916 offensives in Iran and Egypt. However, the protracted war exhausted the Ottoman Empire. By mid-1918, the initiative on all fronts had been taken over by the enemy, so there was no choice but to conclude an armistice on October 30. In Turkey, the sultanate was abolished in 1922, and the following year the country became a republic.