Gavrilo Princip Pins and Buttons
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Description: The Black Hand, also known as "Unification or Death" — a secret society of assassins within the Serbian military who sought to liberate the Kingdom of Serbia and other ethnically-Serbian territories from the Austro-Hungarian Empire. Through agents including Gavrilo Princep, Unification or Death murdered Austrian Archduke Franz Ferdinand and his wife, Sofie, beginning the falling domino chain that led to the start of World War I.
