Austria Declares War on Serbia: World War I Begins
Austria-Hungary declares war on Serbia after Belgrade rejects the harsh terms of an ultimatum, transforming a regional dispute into a continental conflagration. This single act triggers a chain reaction of alliances that drags Russia, Germany, France, and Britain into a four-year global conflict redrawing borders and empires for decades.
July 28, 1914
112 years ago
Key Figures & Places
What Else Happened on July 28
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