History Today: When Austria-Hungary’s declaration of war on Serbia began World War I 

World War I began on July 28, 1914, after Austria and Hungary declared war on Serbia. This came just a month after Archduke Franz Ferdinand of Austria and his wife were killed by Serbian nationalist Gavrilo Princip in Sarajevo. On this day in 2005, the Irish Republican Army formally announced the end of its decades-long armed campaign

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