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.
Serbian Campaign of World War I
Before the war, the Kingdom of Serbia had 4,500,000 inhabitants. According to the New York Times, 150,000 people are estimated to have died in 1915 alone during the worst typhus epidemic in world history. With the aid of the American Red Cross and 44 foreign governments, the outbreak was brought under control by the end of the year. The number of civilian deaths is estimated by some sources at 650,000, primarily due to the typhus outbreak and famine, but also direct clashes with the occupiers. Serbia's casualties accounted for 8% of the total Allied military deaths. 58% of the regular Serbian Army (420,000 strong) perished during the conflict. According to the Serb sources, the total number of casualties is placed around 1,000,000: 25% of Serbia's prewar size, and an absolute majority (57%) of its overall male population. "L.A. Times" and "N.Y. Times" also cited early Serbian sources which claimed over 1,000,000 victims in their respective articles. Modern western and non-Serb historians put the casualties number either at 45,000 military deaths and 650,000 civilian deaths or 127,355 military deaths and 82,000 civilian deaths.