Science Fair Project Encyclopedia World War I World War I, also
known as the First World War, the Great War, the War of the
Nations, and the War to End All Wars, was a world conflict
occurring from 1914 to 1918. No previous conflict had mobilized
so many soldiers or involved so many in the field of battle.
Never before had casualties been so high. Chemical weapons were
used for the first time, the first mass bombardment of civilians
from the sky was executed, and some of the century's first
large-scale civilian massacres took place. Four dynasties, the
Habsburgs, the Romanovs, the Ottomans and the Hohenzollerns, who
had roots of power back to the days of the Crusades, all fell
after the war. Eighty seven years after the war ended there are
few veterans of this war left, and not many who remember the
period clearly. World War I proved to be the decisive break with
the old world order, marking the final demise of absolutist
monarchy in Europe. It would prove the catalyst for the Russian
Revolution, which would