Was First World War Inevitable? - The Forgotten Telegram (On the 100th anniversary of WWI. Little-known facts and mysteries of the eve of WWI) Almost 100 years after the begining of First World War, there is still exist some forgotten or mysterious facts. The author tells the story of a forgotten (by historians) telegram of Russian Emperor Nicholas II to German Emperor Wilhelm II on July 29, 1914 - two days before the start of WWI. Documentary sources found by the author convincingly shows that the telegram would prevent the war - if the Kaiser Wilhelm would agreed with the proposal of the Russian Emperor. In addition, the author criticizes the version of "equal responsibility" of the great European powers for starting WWI, and tells the story of the little-known (or the forgotten) facts of peacekeeping efforts of Nicholas II for the convening of the Hague Conference in 1899, and during the Balkan Wars of 1912-1913. The last part of the brochure is devoted to the analysis of the state of Russia by 1917, on the eve of Russian catastrophe. The brochure contains the reference of sources (36 references), and this may be of interest as to the general reader so and for professional historians.