US Peace Plan Presented in London

[Ping Tung]

6. 23 July 1914 - Austria-Hungary issues a series of demands in an ultimatum to the Kingdom of Serbia

23 July 1914 – Austria-Hungary issues a series of demands in an ultimatum to the Kingdom of Serbia demanding Serbia to allow the Austrians to determine who assassinated Archduke Franz Ferdinand. Serbia accepts all but one of those demands and Austria declares war on July 28

What followed

World War I resulted in an estimated 40 million casualties, including around 20 million deaths and 21 million wounded,