On this day, 12 December 1969, after months of workers’ and students’ strikes, a bomb exploded at a bank in central Milan, killing 17 and wounding 88. Initially blamed on the extra-parliamentary left (leading to numerous arrests and the police murder of anarchist rail worker Giuseppe Pinelli), it was later discovered to have been carried out by the far-right in concert with the state, as part of what would become known as ‘the strategy of tension’. Three fascists were eventually jailed in 2001.
This is a short history of the strategy of tension: https://libcom.org/history/articles/strategy-of-tension-italy https://www.facebook.com/workingclasshistory/photos/a.296224173896073/1290699417781872/?type=3