World War I casualties
The total number of deaths includes from 9 to 11 million military personnel. The civilian death toll was about 8 million, including about 6 million due to war-related famine and disease. The Triple Entente (also known as the Allies) lost about 6 million military personnel while the Central Powers lost about 4 million. At least 2 million died from diseases and 6 million went missing, presumed dead. This article lists the casualties of the belligerent powers based on official published sources.
Croatia during World War I
In July 1918, first cases of Spanish flu, which killed more than 20 million people worldwide, were reported in Croatia. On average, 60 people were dying in Zagreb per week. In the most difficult period of the epidemic that number has grown to more than 200 people, with a peak in the second week of December, when the number increased to 264. In less than four months, Spanish flu took 700 lives in Zagreb alone, and probably tens of thousands on the whole Croatian territory. Contemporaries evaluated that nearly 90% of the Croatian population was affected in the second half of 1918. Estimate of 15,000 to 20,000 victims in Croatia should be taken as the lower limit of the number of victims of the epidemic.