This Week in History

June 28, 1914, Gavrilo Princip, a Bosnian Serb, assassinated Archduke Francis Ferdinand and his wife Sofia of Austria. The killings set off a chain of events that culminated in World War One.

Following the killings, an elaborate network of treaties among the nations of Europe led to a rapid escalation in the war between the Central Powers - Germany, Austro-Hungarian Empire, Ottoman Empire, and the...