Starting off as a patriotic movement to restore Ming rule in China, triads later turned to crime, including drugs, extortion, gambling and prostitution
Triad societies originated in 17th century China when the Hung Mun came together in an attempt to overthrow the Qing dynasty in an unsuccessful bid to restore the Ming dynasty.
Members were expected to regard each other as blood brothers, which is perhaps why they have become known colloquially as the Chinese mafia. There was a clear hierarchical structure within the group, initiation ceremonies and certain codes of conduct.