Civilian casualty ratio
Some 7 million combatants on both sides are estimated to have died during World War I, along with an estimated 10 million non-combatants, including 6.6 million civilians. The civilian casualty ratio in this estimate would be about 59%. Boris Urlanis notes a lack of data on civilian losses in the Ottoman Empire, but estimates 8.6 million military killed and dead and 6 million civilians killed and dead in the other warring countries. The civilian casualty ratio in this estimate would be about 42%. Most of the civilian fatalities were due to famine, typhus, or Spanish flu rather than combat action. The relatively low ratio of civilian casualties in this war is due to the fact that the front lines on the main battlefront, the Western Front, were static for most of the war, so that civilians were able to avoid the combat zones.
Middle Eastern theatre of World War I
Allied military losses are placed between 1,000,000 and 1,500,000 including killed, wounded, captured or missing. This includes 303,000 British Empire and French casualties in Gallipoli, 601,000 British Empire casualties in Sinai-Palestine, at least 140,000 Russian casualties in the Caucasus, and 256,000 British Empire casualties in Mesopotamia, as well as additional Russo-British losses in Persia. Most of the British casualties were non-battle casualties; total British battle casualties inflicted by the Ottomans were estimated as 264,000 by Field Marshal Lord Carver. In addition to these were over 11,000 casualties sustained by Italians fighting Ottoman-backed Senussi tribesmen in the first half of 1915 alone, with unknown losses for the Senussi themselves.