I spent a few intensive weeks in Spring 2009 in this tiny leftist archive in Berlin doing research for a paper on the history of the "black block," which is not an organisation but a protest tactic. it's kinda relevant today, given the push to label "antifa" a terrorist org.

This is the article. I haven't looked at it since it was published really so I am cringing at the prose. barf!!!

https://politicsandculture.org/2009/11/09/macht-kaputt-was-euch-kaputt-macht-on-the-history-and-the-meaning-of-the-black-block/

According to one source, the first usage of the term ‘schwarzer Block’ can be found in a Frankfurt anarchist call out for the 1980 Mayday festivities: ‘Anarchy=Freedom! Come out to the Black Block’...

The call was following a particularly brutal battle that took place the previous year between police and anti-fascist protesters, dressed in black, wearing helmets, and carrying sticks, keen on stopping an annual neo-Nazi march, which they succeeded in doing.

The Black Block as a form of resistance functions as a singularity, ‘united’ in anonymity against a police apparatus that cannot map its organizational structures. The Black Block is a combination of affinity groups—an anarchist formulation—and free flowing individuals

The individuals share nothing but certain motifs of militancy—attire, chants, and a desire to remain anonymous...

“There are no programs, statutes, or members of the Black Block. There are, however, political ideas and utopias, which determine our lives and our resistance."

The West German state effectively created the "group"via a "crown witness" in a court case. The historical irony of a state "designating" a fictional political group only to turn around and see the tactic's popularity explode through all the publicity should not be lost on you!