Archduke Franz Ferdinand, heir to the throne of the Austro-Hungarian Empire, wasn't exactly a well-loved personality, and was described by historians as suspicious, hysterical and unpopular. Still, he did accomplish one stunning feat: His death inadvertently launched the First World War. The duke was shot on June 28, 1914, in Sarajevo, Bosnia, by Gavrilo Princip, a member of a Yugoslav independence movement known as Young Bosnia and an assassin for The Black Hand, a secret society formed by members of the Serbian Army. Austria-Hungary believed the Serbian military was involved in the plot and issued an ultimatum, then invaded Serbia when part of the ultimatum was rejected. A tangle of political alliances then swept all the major world powers into the war, leading to millions of deaths.