Austro-Hungarian Archduke Franz Ferdinand's assassination, in Sarajevo 100 years ago, kicked off World War I. His killer, Gavrilo Princip, was a Bosnian nationalist looking to punish the Austo-Hungarian Empire for occupying his homeland. These four minute video shows you exactly how he did it.
As British television historian Dan Snow entertainingly explains, Princip wasn't acting alone. He was part of a team of assassins laid out throughout the city, most of whom had failed before Princip took his fatal shot at the heir to Austro-Hungarian throne:
This awesome GIF breaks the story of the assassination down into a few quick frames: