The Soviet Union suffered the most losses during World War 1. They had over 23 million casualties during the war.
Russia.
Russia suffered the greatest loss of life during World War I. There were thousands of casualties on all sides suffered during the war.
Germany or France
Allied powers suffered the most casualties
japan
Russia.
RuSsIa
Russia.
Russia suffered the biggest losses during WW1.
Russia suffered the most total casualties.But in terms of percentage of of military forces it was Austria-Hungary
Russia suffered the greatest loss of life during World War I. There were thousands of casualties on all sides suffered during the war.
Canada
Russia.
The Russians .
Russia
Of the 48.2 million deaths from all causes during WWII the Soviet Union suffered the greatest losses in human lives with an estimated 10 million military and 10 million civilian deaths. As a matter of interest, Russia (pre Communist) also suffered the worst losses in WW I.
Soviet Union.