Through NATO, working with various Western European intelligence agencies, the CIA set up a network of stay behind “secret armies” which were responsible for dozens of terrorist atrocities across Western Europe over decades. This report will focus on the stay behind army in Italy, as it is the most documented. Its codename was Operation Gladio, the ‘Sword’.
In the early 1950s, the United States began training networks of “stay behind” volunteers in Western Europe, so that in the event of a Soviet invasion, they would “gather intelligence, open escape routes and form resistance movements.” The CIA financed and advised these groups, later working in tandem with western European military intelligence units under the coordination of a NATO committee. In 1990, Italian and Belgian investigators started researching the links between these “stay behind armies” and the occurrence of terrorism in Western Europe for a period of 20 years.