What is Years Of Lead?

Legal Definition
The Years of Lead were a political phenomenon related to the Cold War that was characterized by left- and right-wing terrorism and the strategy of tension, beginning in Italy and later spreading to the rest of Europe. In Italy terrorist groups include the Red Brigades and Ordine Nuovo, in Germany there was the Red Army Faction and in France there was Action directe. In Belgium, the années de plomb or "Bloody Eighties", refers to the Brabant massacres which resulted in 28 deaths. The far-right movement Westland New Post (WNP) has been suspected in this campaign. Attacks by the Communist Combatant Cells, a short-lived group, killed two. Many of the right-wing groups involved have been linked to Operation Gladio. The liberation of James L. Dozier signaled the end of the years of lead.
-- Wikipedia