Watch the Guardian's interactive documentary on the first world war – video trailer

This Documentary Is Telling the Story of World War I in Real Time

World War II in Europe: Day by day change in map.

Map of the Day: the History of the World Every Year - The Sounding Line

Map of the Day: 4,500 Years of Battles in One Time-Lapse Map - The Sounding Line

World War I Major Battles List | Tannenberg, Marne, Verdun, Somme & Ypres

The Beginning of World War I in 1914: A Timeline

The history of World War I