The Unione Corse was the general name given by American authorities to the major Corsican gangs who organized the French Connection, the heroin trade between France and the U.S. from the 1950s to the early 1970s.
The end of the French Connection caused the disbandment of many Corsican clans involved in the heroin trade. But the evolution of Corsican Mafia has continued in several illegal activities (hold-up, racketeering, casinos, illegal slot machines, various drug dealing, and prostitution). From the 1980s to the end of 2000s, Corsican mafia was constituted by two major groups; the Brise de Mer, based in Northern Corsica, and the Colonna clan (also named "Jean Jé Colonna's family"), based in Southern Corsica. But since 2007, a violent internal conflict troubled the Corsican mafia, occasioning around 102 murders in the Island. This conflict caused the fall of this two groups and the rise of new Corsican gangs. Today, the Corsican mafia is constituted by a lot of gangs or families, allied or rivals. The Venzolasca gang, the Brise de Mer successors, the "Petit Bar" gang ("Little Bar" in English), the Valinco mobsters and the Corsican mob of Marseille, are the most famous of them.