Unification or Death, popularly known as the Black Hand, was a secret military society formed in 1901 by officers in the Army of the Kingdom of Serbia. It gained a reputation for its alleged involvement in the assassination of Archduke Franz Ferdinand in Sarajevo in 1914 and for the earlier assassination of the Serbian royal couple in 1903, under the aegis of Captain Dragutin Dimitrijević.
Early members of the Black Hand
Ritual cross of the Black Hand
Signatures
A secret society is an organization about which the activities, events, inner functioning, or membership are concealed. The society may or may not attempt to conceal its existence. The term usually excludes covert groups, such as intelligence agencies or guerrilla warfare insurgencies, that hide their activities and memberships but maintain a public presence.
"Secret Society Buildings at Yale College" by Alice Donlevy c. 1880. Pictured are: Psi Upsilon (Beta chapter), 120 High Street. Left center: Skull and Bones (Russell Trust Association), 64 High Street. Right center: Delta Kappa Epsilon (Phi chapter), east side of York Street, south of Elm Street. Bottom: Scroll and Key (Kingsley Trust SSS Nonse Association), 490 College Street.
The Brethren of Sincerity) were a secret society of Muslim philosophers in Basra, Iraq, in the 9th or 10th century CE.
A Hongmen seal, 19th century