(in credits order)
Rest of cast listed alphabetically
- Charles Chaplin(archive footage) (as Charlot)
- Kaiser Wilhelm II(archive footage) (as Guillaume II)
- King Albert I(archive footage) (as Albert Ier)
- King George V(archive footage) (as George V)
- Erich Ludendorff(archive footage) (as Ludendorff)
- John J. Pershing(archive footage) (as Pershing)
- Philippe Pétain(archive footage)
- Aleksey Nikolaeyvitch Romanov(archive footage) (as Tsarevitch Alexis)
- Tsar Nicholas II(archive footage) (as Nicolas II)
- Paul von Hindenburg(archive footage) (as Hindenburg)
- Woodrow Wilson(archive footage)
