Turkey: British troops in a bombproof shelter, Gallipoli, Dardanelles Campaign, c. 1915

The Gallipoli Campaign, also known as the Dardanelles Campaign or the Battle of Gallipoli or the Battle of Canakkale (Turkish: Canakkale Savasi), took place on the Gallipoli peninsula in the Ottoman Empire (now Gelibolu in modern day Turkey) between 25 April 1915 and 9 January 1916, during the First World War. A joint British and French operation was mounted to capture the Ottoman capital of Constantinople (Istanbul) and secure a sea route to Russia. The attempt failed, with heavy casualties on both sides. The campaign was considered one of the greatest victories of the Turks and was reflected on as a major failure by the Allies.