Operation Gladio

Operation Gladio was the cryptonym for the Italian branch of a covert network of NATO-sponsored "stay-behind" armies established across Western Europe beginning in the late 1940s and continuing through the Cold War. The network was organized under the auspices of the CIA and British intelligence to provide a resistance and sabotage infrastructure that would operate behind enemy lines in the event of a Soviet invasion or communist takeover. In Italy, the stay-behind network was linked by parliamentary investigators to the "strategy of tension" - a series of right-wing terrorist bombings from 1969 to 1984 blamed on left-wing groups that were intended to create political conditions justifying authoritarian government.¹

Origins and Structure

The concept of stay-behind networks developed from British wartime planning for resistance operations in case of German occupation, formalized into the postwar Special Operations Executive's protocols. In Italy and other Western European countries, the CIA and its predecessor organizations recruited and equipped underground networks immediately after the war, initially from former resistance fighters and, controversially, from former fascist and collaborationist elements with anti-communist credentials.

The Italian network was formally named "Gladio" after the Roman short sword. It operated under the nominal supervision of SIFAR (the Italian military intelligence service, predecessor to SISMI) and maintained a parallel existence through Italy's successive government changes. Arms caches were hidden throughout Italy; members received training in guerrilla warfare, sabotage, and stay-behind operations; and a command structure linked to NATO's Allied Forces Southern Europe (AFSOUTH) in Naples coordinated the network with analogous organizations in other NATO member states.¹

The stay-behind infrastructure extended across at least 16 NATO and affiliated countries under coordinating bodies at NATO headquarters. Each national network had a local name - Gladio in Italy, SDRA8 in Belgium, P-26 in Switzerland, and analogous names in other countries - and operated with varying degrees of knowledge at the governmental level.²

The Strategy of Tension

Italian parliamentary and judicial investigations from the 1970s onward found evidence connecting Gladio-linked networks to the right-wing terrorist bombings of the anni di piombo (years of lead). The strategy, as reconstructed by investigators, involved carrying out bombings and assassinations that could be blamed on far-left groups (particularly the Red Brigades and Maoist organizations), in order to shift Italian public opinion against the left and justify emergency security measures that might prevent the Italian Communist Party from entering government.

The principal attacks attributed to this strategy included:

The Piazza Fontana bombing of December 12, 1969, in which a bomb at the Banca Nazionale dell'Agricoltura in Milan killed 17 people and wounded 88. Initial blame fell on anarchists; years of investigation ultimately pointed toward neo-fascist networks connected to Ordine Nuovo with connections to SID (Italian military intelligence) and the interior ministry.

The Peteano bombing of May 31, 1972, in which three Carabinieri were killed by a bomb in a Fiat 500. Vincenzo Vinciguerra, a neo-fascist convicted for the bombing, acknowledged in confessions that the attack was intended to demonstrate the inadequacy of the Italian state's response to terrorism and to generate pressure for authoritarian solutions.

The Italicus Express bombing of August 4, 1974, which killed 12 and wounded 48.

The Bologna railway station bombing of August 2, 1980, which killed 85 people and wounded more than 200 in the deadliest attack of the era. Decades of judicial proceedings ultimately produced convictions of neo-fascist Nuclei Armati Rivoluzionari members, though the precise command structure and political authorization for the attack remained contested.¹

Licio Gelli and Propaganda Due

The strategy of tension investigations repeatedly intersected with the P2 Masonic lodge headed by Licio Gelli. P2's membership list, discovered in March 1981 when Gelli's villa was searched, included senior officers from all branches of the Italian military and intelligence services, politicians from multiple parties, magistrates, financiers, and media figures. The overlap between P2 membership and Gladio-connected networks led investigators to conclude that the lodge served as a coordinating mechanism across the Italian security establishment that allowed the strategy of tension to continue without exposure.³

The 1990 Disclosure

Italian Prime Minister Giulio Andreotti disclosed Gladio's existence to Parliament on October 24, 1990, in a statement acknowledging the stay-behind network's existence and providing a partial account of its operations and membership. The disclosure was forced by an investigation conducted by magistrate Felice Casson, who had obtained documents establishing the Gladio network's existence and connection to the Peteano bombing while investigating that case.

Andreotti's disclosure triggered immediate political controversy in Italy and across Europe, where governments faced questions about whether analogous networks existed in their own countries. The European Parliament passed a resolution on November 22, 1990 condemning the stay-behind networks as a threat to democratic governance and calling on member states to investigate and disclose their networks' activities.²

Italian Parliamentary Investigation

The Italian Senate's Commission on the Massacres (Commissione parlamentare d'inchiesta sul terrorismo in Italia, commonly called the Commissione Stragi) conducted a multi-year investigation that produced extensive documentation of Gladio's structure, its relationship to the strategy of tension, and its connections to both Italian and foreign intelligence services. The Commission's final reports, issued in 2000-2001, concluded that state actors had participated in, facilitated, or covered up attacks attributed to non-state terrorists, and that the CIA had prior knowledge of Italian terrorist operations that it did not share with Italian authorities.¹

Belgian Dimension

In Belgium, the stay-behind network SDRA8 was investigated in connection with the Brabant Massacres - a series of supermarket robberies and mass killings in 1982-1985 that killed 28 people and have never been officially solved. Investigators established links between SDRA8-connected figures and the gang suspected of the massacres, raising questions about whether the Belgian network's activities paralleled Italy's strategy of tension. The Belgian investigation remained unresolved; no prosecutions were brought for the massacres, and the statute of limitations on the killings expired in 2015.²