Operation Gladio

Operation Gladio was the codename for clandestine "stay-behind" operations of armed resistance that were organized by the Western Union (WU; founded in 1948), and subsequently by NATO (formed in 1949), and by the CIA (established in 1947), in collaboration with several European intelligence agencies during the Cold War. Although Gladio specifically refers to the Italian branch of the NATO stay-behind organizations, Operation Gladio is used as an informal name for all of them. Stay-behind operations were prepared in many NATO member countries, and in some neutral countries.

According to several Western European researchers, the operation involved the use of assassination, psychological warfare, and false flag operations to delegitimize left-wing parties in Western European countries, and even went so far as to support anti-communist militias and right-wing terrorism as they tortured communists and assassinated them, such as Eduardo Mondlane in 1969. The United States Department of State rejected the view that they supported terrorists and maintains that the operation served only to resist a potential invasion of Western European countries by the Soviet Union.

Following the fall of France in 1940, Winston Churchill created the Special Operations Executive (SOE) to both assist resistance movements and carry out sabotage and subversive operations in occupied Europe. It was revealed half a century later that SOE was complemented by a stay-behind organisation in Britain, created in extreme secrecy, to prepare for a possible invasion by Nazi Germany.

A network of resistance fighters was formed across Britain and arms caches were established. The network was recruited, in part, from the 5th (Ski) Battalion of the Scots Guards (which had originally been formed, but was not deployed, to fight alongside Finnish forces fighting the Soviet invasion of Finland). The network, which became known as the Auxiliary Units, was headed by Major Colin Gubbins – an expert in guerrilla warfare (who would later lead SOE). The units were trained, in part, by "Mad Mike" Calvert, a Royal Engineers officer who specialised in demolition by explosives and covert raiding operations. To the extent that they were publicly visible, the Auxiliary Units were disguised as Home Guard units, under GHQ Home Forces. The network was allegedly disbanded in 1944; some of its members subsequently joined the Special Air Service and saw action in North-West Europe.

While David Lampe published a book on the Auxiliary Units in 1968, their existence did not become widely known by the public until reporters such as David Pallister of The Guardian revived interest in them during the 1990s.

After World War II, the UK and the US decided to create "stay-behind" paramilitary organizations, with the official aim of countering a possible Soviet invasion through sabotage and guerrilla warfare behind enemy lines. Arms caches were hidden, escape routes prepared, and loyal members recruited, whether in Italy or in other European countries. Its clandestine "cells" were to stay behind in enemy-controlled territory and to act as resistance movements, conducting sabotage, guerrilla warfare and assassinations.

Clandestine stay-behind (SB) units were created with the experience and involvement of former SOE officers. Following Giulio Andreotti's October 1990 revelations, General Sir John Hackett, former commander-in-chief of the British Army on the Rhine, declared on November 16, 1990, that a contingency plan involving "stay behind and resistance in depth" was drawn up after the war. The same week, Anthony Farrar-Hockley, former commander-in-chief of NATO's Forces in Northern Europe from 1979 to 1982, declared to The Guardian that a secret arms network was established in Britain after the war. Hackett had written in 1978 a novel, The Third World War: August 1985, which was a fictionalized scenario of a Soviet Army invasion of West Germany in 1985. The novel was followed in 1982 by The Third World War: The Untold Story, which elaborated on the original. Farrar-Hockley had aroused controversy in 1983 when he became involved in trying to organise a campaign for a new Home Guard against a potential Soviet invasion.

NATO provided a forum to integrate, coordinate, and optimise the use of all SB assets as part of the Emergency War Plan. This coordination included the military SB units, which were part of NATO's order of battle, and the clandestine SBOs run by NATO nations. Western secret services had cooperated in various bilateral, triparty, and multilateral fora in the creation, training, and running of clandestine Stay-behind organisations (SBO) soon after World War II. In 1947, France, the United Kingdom, and the Benelux countries had created a joint policy on SB in the Western Union Clandestine Committee (WUCC), a forum of the Western Union, the European defence alliance predating NATO. The format entered into NATO structures around 1951–1952 when the Supreme Allied Commander in Europe (SACEUR) established such an 'ad hoc' committee, the Clandestine Planning Committee (CPC) at SHAPE. The peacetime role of the CPC would have been to coordinate the different military and paramilitary plans and programmes in NATO nations (and partners like Switzerland and Austria) in order to avoid duplication of effort. The CPC itself had at least two working groups – one on communications and one on networks. SACEUR also established a Special Projects Branch to develop and coordinate 'clandestine forces operating in support of SACEUR's military forces'.