The Serbians took heavy losses during this campaign, their army of 420,000 was decimated to around 100,000.
The Serbians lost a total of 1,1000,000 during the war - soldiers and civilians. This represented about 27% of Serbia's overall population, about 60% of their male population.
5. The Battle of Passchendaele
848,614 total casualties estimated
Also known as the Third Battle of Ypres, the aim of the battle was to breakthrough at the village of Passchendaele in West Flanders, Belgium and beat back the Germans.
Soldiers fought under miserable conditions, and both sides suffered