OVERVIEW

World War I was the first major world-wide modern war. Learn about the outbreak and major battles of World War I.
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World War I in 1917

In early 1917 the United States was finally pushed into the war. On January 31, Germany resumed unrestricted submarine warfare, in an attempt to halt the imports of food and supplies into Britain.

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  • World War I

    World War I

    World War I was the great armed conflict of 191418. Until World War II, it was often called the Great War because it was the most destructive and widespread war the world had ever seen. See more »

  • Aerial and Colonial Warfare in World War I - 1914-1918

    Aerial and Colonial Warfare in World War I - 1914-1918

    The use of aircraft in warfare led to great changes in intelligence gathering and tactics. See more »

  • Economic and Social Aspects of World War I

    Economic and Social Aspects of World War I

    To sustain huge armies in the field, each nation had to wage total war that is, commit all resources to the war effort. See more »

  • World War I in 1914

    World War I in 1914

    Invasion of Belgium. On July 27 Belgium and Luxembourg were informed by Germany of its intention to pass through. See more »

  • World War I in 1916

    World War I in 1916

    Two great battles were fought on the Western Front in 1916—at Verdun (February 21-July 11) and the Somme (July 1-November 18). See more »

  • World War I in 1918

    World War I in 1918

    At the beginning of 1918 the peoples of Europe were weary of war. Among the Central Powers, Austria-Hungary, Bulgaria, and Turkey were near collapse. See more »

  • World War I Armistice

    World War I Armistice

    As early as August, 1918, senior German commanders suspected that their forces would collapse in the face of a sustained Allied offensive. See more »

  • World War I in 1915

    World War I in 1915

    The Western Front. In November, 1914, Moltke was relieved of his duties as supreme commander and in December was replaced by General Erich von Falkenhayn. See more »

  • World War I in 1917

    World War I in 1917

    In early 1917 the United States was finally pushed into the war. On January 31, Germany resumed unrestricted submarine warfare, in an attempt to halt the imports of food and supplies into Britain. See more »

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