When Gavrilo Princip assassinated Archduke Franz Ferdinand, the heir to the Austro-Hungarian throne, on June 28, 1914, few could have known it would reverberate for four years of brutal war ...
World War I involved 32 nations from 1914 to 1919. It redrew the world map and reshaped many borders in Europe. The collapse of the Russian Empire created Poland, the Baltics, and Finland.