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  1. 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 …

  2. 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 …

  3. World War I - Encyclopedia Britannica

    Nov 17, 2025 · 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 …

  4. 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 …

  5. The Causes of WWI - World History Encyclopedia

    May 15, 2025 · Which event started World War I? The event that started WWI was the assassination of Archduke Franz Ferdinand, heir to the Habsburg throne, by a Bosnian Serb …

  6. 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.

  7. Six Causes of World War I | Norwich University - Online

    The First World War began in the summer of 1914, shortly after the assassination of Austria’s Archduke, Franz Ferdinand, and lasted more than four years, ending in 1918.

  8. The Main Causes of WW1 - WorldAtlas

    Nov 13, 2025 · The Main Causes of WW1 World War One (also known as the First World War or the Great War) was arguably the most significant event of the 20th century, leading to …

  9. 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 …

  10. First World War - causes, major events, and its global impact

    Nov 27, 2025 · Explore the key events, battles, and lasting impact of World War One, the first global conflict that shaped the world.