World War I casualties
The total number of military and civilian casualties in World War I were about 40 million: estimates range from 15 to 19 million deaths and about 23 million wounded military personnel, ranking it among the deadliest conflicts in human history.
Ireland and World War I
The number of Irish deaths in the British Army recorded by the registrar general was 27,405, a casualty rate of 14 percent, roughly in line with the rest of the British forces. By contrast, the National War Memorial at Islandbridge, Dublin is dedicated "to the memory of the 49,400 Irish soldiers who gave their lives in the Great War, 1914–1918". This figure is often questioned. Recent estimates for Northern Ireland are given at up to 20,000 casualties, and between 30,000 and 35,000 for the whole of Ireland. It has been suggested that the often-cited death toll of 40–50,000 refers to all the fatalities in the Irish Divisions. In fact, only 71 percent of the casualties in these Divisions were natives of Ireland. According to the Irish National War Memorial, the figure of 49,400 is inclusive of recent Irish immigrants living in America.