A woman inherits a map of a World War I battlefield in France from her grandfather, an engineer under General Pershing. The map is of St. Mihiel, a little-known but key battle in which U.S. forces ...

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.

The past 100 years have seen another world war and the rise and fall ... (Pull cursor to the right from 1914 to see 1914 map and to the left from 2014 to see the modern map) ...

Britain and its Empire lost almost a million men during World War One ... dug-outs and barbed-wire fences moved very little between 1914-1918, despite attempts on both sides to break through.