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.
France–India relations
The British Raj and Princely States of India suffered the greatest World War I casualties amongst dominions, colonies, protectorates, mandates and other territories of the British Empire. It is estimated that between 64,449 and 73,895 Indians died in Europe during the First World War (compared to between 59,330 and 62,081 Australians and between 58,639 and 64,997 Canadians).