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World War I or the First World War (28 July 1914 – 11 November 1918) was a global conflict between two coalitions: the Allies and the Central Powers.
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World War I (WWI or WW1), also called the First World War, began on July 28, 1914 and lasted until November 11, 1918. It was a global war and lasted exactly ...
The United States declared war on the German Empire on April 6, 1917, nearly three years after World War I started. A ceasefire and armistice were declared ...
1 Immediate causes. 1.1 Assassination of Archduke Franz Ferdinand by Serbian nationalists, 28 June 1914 · 2 Polarization of Europe, 1887–1914 · 3 Domestic ...