Black Hand (Italian: Mano Nera) was a type of Italian and Italian-American extortion racket. It was a method of extortion, not a criminal organization as such, though gangsters of Camorra and the Mafia practiced it.
A June 1912 newspaper report in the New York Tribune stated that the Black Hand "...really exists only as a phrase. As an organization such a thing never existed out of the minds of the police. It is a catch phrase made familiar through the newspapers, and the quick witted criminal of Latin extraction lost no time in using it as a nom de crime, which he wrote at the bottom of his blackmailing letters, sometimes - in fact, generally - adding fanciful decorations of his own, such as daggers dripping blood, revolvers spitting fire and bullets, crudely drawn skulls and crossbones and the inevitable sketch of a human hand."
The roots of the Black Hand can be traced to the Kingdom of Naples as early as the 1750s. The English language term specifically refers to the organization established by Italian immigrants in the United States during the 1880s. A minority of the immigrants formed criminal syndicates, living alongside each other.
By 1900, Black Hand operations were firmly established in the Italian-American communities of major cities including New York, Philadelphia, Chicago, New Orleans, Scranton, San Francisco, Olean, NY, and Detroit. In 1907, a Black Hand headquarters was discovered in Hillsville, Pennsylvania, a village located a few miles west of New Castle, Pennsylvania. The Black Hand in Hillsville established a school designed to train members in the use of the stiletto. Although more successful immigrants were usually targeted, possibly as many as 90% of Italian immigrants and workmen in New York and other communities were threatened with extortion.