Assassination of Archduke Franz Ferdinand of Austria, heir to the Austro-Hungarian throne, who was killed in Sarajevo along with his wife Duchess Sophie by Bosnian Serb Gavrilo Princip.
Read moreAustria-Hungary seeks German support for a war against Serbia in case of Russian militarism. Germany gives assurances of support.
Read moreThe Russian offensive in the Carpathians begins. It will continue until April 12.
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