Respuesta :

katyyym
The assassination of Archduke Franz Ferdinand of Austria by a Bosnian Serb terrorists.
ashlyn5522

Answer:

the assassination of archduke franz ferdinand of austria-hungary

Explanation:

The assassination of Archduke Franz Ferdinand in Sarajevo on 28th June 1914, it triggered a chain of events that resulted in World War 1. After the assassination, Austria-Hungary threatened war on Serbia.