Population of the Kingdom of Serbia 1834-1910
In 1834, the population of the Kingdom of Serbia was just 678 thousand people, although there were many ethnic Serbs living outside these borders under the rule of other kingdoms. The population then grew rather steadily to 1.35 million in 1874, before it grows to 1.9 million in 1884. This huge jump in the population is a result of the acquisition of new territory from the Ottomans, which added over 300,000 people to the Kingdom, and the new data also included military personnel, which was not included in the previous entries.
From 1884 onwards the population continues to grow, and it reaches 2.9 million people by 1910, which is the final collection of data before the First World War. World War I began on July 28th 1914 when Austria-Hungary declared war on Serbia in retaliation for the assassination of Franz Ferdinand by a Bosnian Serb, Gavrilo Princip, in Sarajevo one month before. By the end of the war as many as 1.3 million Serbs died as a direct result of the conflict, which is the highest percentage of any overall population involved in the war, and almost sixty percent of all Serbian men died.