Total Losses in WWII numbered around 50 Million. The highest losses were sustained by the Soviet Union, which had over 20 Million dead. The answer above is true but it depends what you are talking about. Civilian, soldiers killed in action, or war crimes.
80%
Estimated 416,800 military loses
Germany
The Sovjet-Afghanistan war in 1979-86
Russia
Italy
Harley Miller
Oklahoma
over 500,000 humans died in world war 2 , and over 2 billion were injured seriously, and that's a lot, which is sad
The highest price the Russians paid in World War 2 was having 20 million of their people murdered by the Nazi Germans.
For the United States military, typically the highest medal for valor is the Congressional Medal of Honor.
General Simon Bolivar Buckner