Poland with 6,028,000
The physical cost of World War I was tremendous. The total count of casualties was nearly 40 million people. That number included military and civilian casualties, and represented deaths due to fighting, as well as disease.
Germany military - 3,250,000 civilian - 2,350,000 Italy military - 226,900 civilian - 60,000 Japan military - 1,740,000 civilian - 393,400 US military 405,000 civilian - 68 (Pearl Harbor) France military 122,000 civilian - 470,000 England military - 305,800 civilian - 6,700,000 Russia military - 11,000,000 civilian - 6,700,000 China military - 1,400,000 civilian - 8,000,000 Poland- from 5.5m to 6.5m all together (not caunting many soldiers who fleed the country and joined army in other countries)
The total number of military and civilian casualties in World War I, was around 37.5 million. There were 16.5 million deaths and 21 million wounded making it the 6th deadliest conflict in human history.
United Kingdom: 382,600 military deaths; 67,800 civilian deaths; 450,400 total deaths(0.94% Deaths as % of 1939 population). British Commonwealth(incl.UK): 580,000 military deaths; 1,570,000 civilian deaths(1,500,000 of them in India).
The total number of military and civilian casualties in World War I was over 35 million. There were over 15 million deaths and 20 million wounded ranking it among the deadliest conflicts in human history.
The total number of casualties in World War I, both military and civilian, were about 37 million: 16 million deaths and 21 million wounded. The total number of deaths includes 9.7 million military personnel and about 6.8 million civilians
Since 1800, the largest number of casualties due to volcanic eruption has been an estimated 92,000 associated with Mount Tambora in Indonesia in 1815.
The total number of casualties in World War I, both military and civilian, were about 37 million: 16 million deaths and 21 million wounded. The total number of deaths includes 9.7 million military personnel and about 6.8 million civilians. The Entente Powers (also known as the Allies) lost 5.7 million soldiers and the Central Powers about 4 million.
Russia .
The total number of casualties in World War I, both military and civilian, were about 37 million: 16 million deaths and 21 million wounded. Source: http://en.wikipedia.org/wiki/World_War_I_casualties
World War II had the greatest number of casualties caused directly and indirectly by war. The death toll is listed at 84,589,300 for all countries jointly that were involved in the war. The American Civil War had the largest number of United States casualties, listed at 625,000.