"Bombing of Piazza Fontana" and "Bombing of the Bologna railway station" (two of the categories)
Those are part of Operation Gladio.
That's some can of worms you're about to open there. This could become very interesting.
I figure Bologna was a bit of a failure because it was found out that a RW group was behind it and that the secret service was involved. Usually they manage to either remain anonymous (strategy of tension), or have it blamed on some left-wing activist group (false-flag).
http://en.wikipedia.org/wiki/Bologna_massacreThe Bologna massacre (Italian: Strage di Bologna) was a terrorist bombing at the Central Station of Bologna, Italy on the morning of August 2, 1980, which killed 85 people and wounded more than 200. The far-right terrorist organization Ordine Nuovo has been accused of it, while two SISMI (Italian secret service) agents and the headmaster of P2 masonic lodge, Licio Gelli, were convicted for investigation diversion.
http://en.wikipedia.org/wiki/GladioDuring the Cold War era, Operation Gladio was a clandestine "stay-behind" operation sponsored by the CIA and NATO to counter a possible Warsaw Pact invasion of Western Europe after World War II in Italy, as well as in other European countries. <1> NATO stay-behind armies existed in all countries of Western Europe during the Cold War, including Turkey.
Gladio, the Latin word for sword, is a colloquial term to denote the stay-behind networks in various European countries. The exact details of each stay-behind network are still unknown, although Italy, Switzerland and Belgium have had parliamentary inquiries into the matter.
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Gladio's existence came to public knowledge when Prime Minister Giulio Andreotti revealed it to the Chamber of Deputies on October 24, 1990, although far-right terrorist Vincenzo Vinciguerra had already revealed its existence during his 1984 trial. Thirty years after the December 1969
Piazza Fontana bombing, which started the strategia della tensione, General Giandelio Maletti indicated that the massacre had been carried out by the Italian stay-behind army and right wing terrorists on orders of the CIA in order to discredit the PCI, which was negotiating the historic compromise with the Christian Democracy.