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.
German casualties in World War II
The figure of 1,277,000 killed and missing from January 1 1945 - April 30 1945 was estimated by the U.S. Army in the 1947 report "German Manpower"