- Fritz Weaver
- Narrator
- Archduke Franz Ferdinand
- Self
- Winston Churchill
- Self
- Georges Clemenceau
- Self
- Franz Conrad von Hötzendorf
- Self
- Crown Prince Hohenzollern
- Self
- Josephus Daniels
- Self - USN
- Duke of Windsor
- Self - at Funeral of Edward VII, Walks with Father
- Emperor Franz Josef
- Self
- Emperor Karl
- Self
- Empress Augusta Victoria
- Self
- Empress Zita
- Self
- Armand Fallières
- Self
- John French
- Self
- Joseph-Simon Galliéni
- Self
- Grand Duchess Anastasia
- Self
- Grand Duchess Maria
- Self
- Grand Duchess Olga
- Self
- Grand Duchess Tatiana
- Self
- Grand Duke Nicholas
- Self
- Douglas Haig
- Self
- Jean Jaurès
- Self
- Joseph Joffre
- Self
- Kaiser Wilhelm II
- Self
- King Albert I
- Self
- King Alexander of Yugoslavia
- Self
- King Edward VII
- Self - Funeral
- King Ferdinand of Bulgaria
- Self
- King Frederik VIII
- Self
- King George V
- Self
- King George VI
- Self - at Funeral of Edward VII, Walks with Father
- King Manoel II
- Self
- King Nicholas of Montenegro
- Self
- King Peter of Serbia
- Self
- King Victor Emmanuel III
- Self
- Lord Kitchener
- Self
- Koningin Elisabeth
- Self
- Vladimir Lenin
- Self - Speaks Before K. Marx - F. Engels Sign
- Karl Liebknecht
- Self - Harangues Crowd
- Nicholas Pasic
- Self
- John J. Pershing
- Self - with Wilson
- Raymond Poincaré
- Self
- Aleksey Nikolaeyvitch Romanov
- Self
- Franklin D. Roosevelt
- Self - USN During WWI
- Roger Rudel
- Récitant / Narrator (French version) (voice)
- Sultan Mehmed V
- Self
- Lev Trotskiy
- Self - Meets German Officers at Brest Litovsk
- Tsar Nicholas II
- Self
- Tsarina Alexandra
- Self
- Theobald von Bethmann Hollweg
- Self
- Paul von Hindenburg
- Self
- Manfred von Richthofen
- Self
- Woodrow Wilson
- Self - Blindfolded to Draw Draft No.
