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

Cold War Cartoons - Duck and Cover with Bert the Turtle | Soldier Systems Daily

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

World War I | Causes & Effects | Britannica

The Beginning of World War I in 1914: A Timeline