History
What is World War I?
World War I (1914–1918) was a global conflict centered in Europe that drew in the world's great powers. Sparked by the assassination of Archduke Franz Ferdinand, it introduced industrial-scale warfare and reshaped the modern world.
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Watch a 2-minute lesson with voice + animation that explains world war i.
Key things to understand
- 1Triggered in 1914 by the assassination of Archduke Franz Ferdinand, amid tangled alliances.
- 2It pitted the Allied Powers against the Central Powers.
- 3New weapons — machine guns, tanks, poison gas — made it devastatingly lethal.
- 4It ended in 1918 and redrew borders, sowing seeds for World War II.
Frequently asked questions
- What caused World War I?
- A mix of nationalism, militarism, imperial rivalry, and alliances, triggered by the 1914 assassination of Archduke Franz Ferdinand.
- Who fought in World War I?
- The Allied Powers (including Britain, France, Russia, later the US) against the Central Powers (Germany, Austria-Hungary, the Ottoman Empire).
- How did World War I end?
- With the armistice of November 1918 and the Treaty of Versailles in 1919.