Founder of the FLNC-Canal Habituel (Corsican: Canale Abituale, FLNC-CA) and its political wing, the Movement for Self-Determination (Muvimentu per l’Autodeterminazione, MPA), Orsoni led the organization until its dissolution in 1997.
Orsoni is called the “man of seven lives” or the “Corsican godfather” in some circles due to his criminal convictions and his tendency to create new lifestyles in new countries to flee persecution.
After a brief period as a far-right activist, Orsoni became an avid supporter of Corsican independence and moved left on the political spectrum.
Shortly after, when Orsoni was very young, his father enlisted in the Algerian war, where he later joined the far-right pro-French terrorist group Organisation armée secrète (OAS).
In the summer of 1975, Orsoni and Battesti returned to Corsica and joined a nationalist militant group, Azione Regiunalista Corsa (ARC).
In 1976, the National Liberation Front of Corsica formed, and Orsoni joined, quickly rising through the ranks to become the head of the FLNC's Paris division.
The demands of the revolt were to release Orsoni as well as another separatist militant, Serge Cacciari, arrested in 1976 for the murder of a gendarme during the Aleria standoff.
His command in Paris and his role in the prison revolt of 1981 had gained him significant fame, and it didn't take much time before both of the Orsoni brothers had become brigade leaders in the FLNC.
After parting ways, Guy Orsoni was kidnapped and murdered by members of the Valinco gang, a large mafia group at the time that was present throughout southern Corsica.
On June 7, 1984, a year into the FLNC-mafia conflict, a commando in Ajaccio was assembled to break into a prison where Valinco gang members involved in the assassination of Guy Orsoni were being held and shoot them dead.
Orsoni’s creation and early leadership of A Cuncolta Naziunalista put him in even more of a powerful position within the FLNC, effectively running the organization.
From 1988 to 1990, numerous brigades and members of the FLNC would begin to leave and create their own army, the FLNC-Canal Historique (Canale Storicu, FLNC-CS).
In March 1996, the FLNC-CS made a short-term agreement with the French government to lay down arms for a three-month period and begin negotiations.
some more radical members claiming to want to resume warfare against the Historiques and the French left the organization and founded the FLNC-Five May (FLNC-Cinque Maghju, FLNC-5M).
In July 2008, Orsoni took up the post of president for AC Ajaccio after his close friend and political ally Michel Moretti had passed.
[14] In August 2008, Orsoni narrowly escaped an assassination attempt carried out by the Brise de Mer, a Corsican mafia organization responsible for a large number of crimes in Corsica and beyond.