Secret Serbian society formed in 1911 primarily by army officers, which used terrorist methods to promote the liberation of Serbs outside Serbia from Habsburg or Ottoman rule.
It conducted propaganda campaigns, organized armed bands in Macedonia, and established revolutionary cells throughout Bosnia. Within Serbia it dominated the army and wielded tremendous influence over the government. It gained its greatest notoriety with the assassination of Archduke Francis Ferdinand in 1914. After a trial in 1917, three leaders were executed and more than 200 were imprisoned. The name also referred to several extortion rackets run by immigrant Sicilian and Italian gangsters in the Italian communities of many large U.S. cities с 1890–1920. Local merchants and wealthy individuals would receive threatening notes printed with black hands, daggers, or other menacing symbols that demanded money on pain of death or destruction of property. It declined with the beginning of Prohibition and large-scale bootlegging.