One hundred years ago, war erupted in Europe ... Also highlighted on separate maps are comparisons of casualties between nations and the high cost the First World War had on their economies.

One hundred years ago, war erupted in Europe ... Also highlighted on separate maps are comparisons of casualties between nations and the high cost the First World War had on their economies.

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.