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  1. World War I - Wikipedia

    At the start of the war, German cruisers were scattered across the globe, some of which were subsequently used to attack Allied merchant shipping. These were systematically hunted down …

  2. World War I: Summary, Causes & Facts | HISTORY

    Oct 29, 2009 · World War I, also known as the Great War, started in 1914 after the assassination of Archduke Franz Ferdinand of Austria. His murder catapulted into a war across Europe that …

  3. World War I - Encyclopedia Britannica

    2 days ago · What was the main cause of World War I? World War I began after the assassination of Austrian archduke Franz Ferdinand by South Slav nationalist Gavrilo Princip on June 28, 1914.

  4. How and why did World War One start? - BBC Bitesize

    Discover how country alliances led to World War One and why the great war started in this BBC Bitesize history KS2 guide.

  5. The causes of the First World War - Imperial War Museums

    The assassination of Austrian archduke Franz Ferdinand sparked the start of the First World War. But what happened next and why did Britain get involved?

  6. The Causes of WWI - World History Encyclopedia

    May 15, 2025 · The three main causes of WWI were Germany's imperialist ambitions, a rise in nationalist independence movements in the Balkans, and a complex network of international …

  7. How the War Started - Canada and the First World War

    On 4 August 1914, Canada, as a member of the British Empire, was at war. Canada's contribution to the First World War led to growing autonomy and international recognition, but at great cost.

  8. The United States and the First World War - U.S. National Park Service

    By September 1918, the AEF began independent operations and played a key role in the “Hundred Days Offensive,” which ended the war. The Americans helped break the fortified …

  9. The causes of World War I: Explained simply - History Skills

    In 1914, a chain of events set off by the shot of a lone assassin in Sarajevo plunged the world into its first truly global conflict. However, the reasons of this catastrophe ran far deeper than just …

  10. Causes of World War I - Wikipedia

    World War I began in the Balkans on July 28, 1914, and hostilities ended on November 11, 1918, leaving 17 million dead and 25 million wounded. Moreover, the Russian Civil War can in many …