The Russian Empire
russia
Every country lost: there is no winner in a war. A couple lost more than the others; Russia and Germany were quite heavily damaged by the war and its aftermath.
I'm not so sure about this. But I'm sure that most of men who enlisted to the war were farm boys or country boys.
Luxembourg lost the least troops during the First World War.
their country was demolished and they lost most everything
Germany
russia
The only country in the world that has never lost a war is Canada.
Germany!
Russia
Russia
Tsarist Russia in World War I and the Soviet Union in World War II.
Serbia
The Soviet Union :)
Russia. :)
The Soviet Union: 15 million
France