Precursors In February 1967, the anarchist group
Black Mask marched on
Wall Street in New York City wearing black clothes and
balaclavas. This was the first instance of a social movement in the western world utilizing masks and black dress, which were used not for purposes of disguise but to signify a
militant uniform identity. In this regard, Black Mask may have indirectly influenced the black bloc tactic.
West German origins The black bloc tactic to wear black clothing, On 1 May 1987, demonstrators in
Berlin-Kreuzberg were confronted by West Berlin police. After this, thousands of violent rioters attacked the police with rocks, bottles and Molotov cocktails. The riots at the
May Day in Kreuzberg became famous after the police had to completely pull out of the "SO 36" neighborhood in Kreuzberg for several hours, and rioters looted shops together with local criminals. When
Ronald Reagan came to Berlin in June 1987, he was met by around 50,000 demonstrators protesting against his
Cold War policies. This included a black bloc of 3,000 people. In November 1987,
Hafenstraße residents and thousands of other protesters fortified their squat, built barricades in the streets and defended themselves against the police for nearly 24 hours. After this the city authorities legalised the squatters residence. Since the late 1980s, Berlin's Kreuzberg district has hosted May Day clashes between anarchists and police. When the
World Bank and the
International Monetary Fund met in Berlin in 1988, autonomous groups hosted an international gathering of
anti-capitalist activists. Numbering around 80,000, the protesters greatly outnumbered the police. Officials tried to maintain control by banning all demonstrations and attacking public assemblies. Nevertheless, there were riots and
upmarket shopping areas were destroyed.
Unified Germany In the period after the fall of the
Berlin Wall, the German black bloc movement continued traditional riots such as May Day in
Berlin-Kreuzberg, but with decreasing intensity. Their main focus became the struggle against the recurring popularity of
Neo-Nazism in Germany. The "turn" came in June 2007, during the
33rd G8 summit. A coordinated black bloc of 2,000 international people came to
Rostock, Germany, built barricades, rioted the streets, set cars alight and attacked the police during a mass demonstration. 400 police officers were injured, as well as about 500 rioters, demonstrators and activists. According to the German
Verfassungsschutz, the weeks of organisation before the demonstration and the riots themselves amounted to a revival for the militant left in Germany. Since the "Battle of Rostock", traditional "May Day Riots" after demonstrations every 1 May in Berlin, and since 2008 also in Hamburg, became more intense.
International development North America in Washington, D.C., on 21 March 2009. The first prominent use of the tactic in United States of America occurred at the Pentagon, in Washington, D.C., on 17 October 1988, although anarchists had been using similar tactics in small numbers in preceding years in places like San Francisco, culminating with several hundred anarchists in black smashing glass store fronts and attacking vehicles in the
Berkeley Anarchist Riot of 1989. In D.C., over one thousand demonstrators—a small number consisting of a black bloc—called for the end to U.S. support for right wing death squads in El Salvador. A black bloc caused damage to property of
GAP,
Starbucks,
Old Navy, and other retail locations in downtown Seattle during the 1999
anti-WTO demonstrations. They were a common feature of subsequent
anti-globalization protests. In the years after the end of the Vietnam War, protest in the US came to assume more legalistic, orderly forms, and was increasingly dominated by the middle-class. This corresponded with the rise of a highly effective police strategy of
crowd control called "negotiated management". Many social scientists have noted the "institutionalization of movements" in this period. These currents largely constrained disruptive protest until 1999. In an unprecedented success for post-Vietnam era civil disobedience, the WTO Ministerial Conference opening ceremonies were shut down completely, host city Seattle declared a state of emergency for nearly a week, multilateral trade negotiations between the wealthy and developing nations collapsed, and all of this was done without fatalities. This occurred in the midst of mass rioting which had been set off by militant anarchists, some of them in a black bloc formation. The call for the Seattle protest had originally come from
Peoples' Global Action (a network co-founded by the
Zapatistas) which supported
diversity of tactics and a highly flexible definition of nonviolence. In the aftermath of the shutdown, however, various NGO spokespeople associated with Seattle DAN claimed that the riotous aspect of the WTO protests was counterproductive and undemocratic. They also asserted that it was only an insignificantly small group from
Eugene, Oregon that engaged in property destruction.
Medea Benjamin told
The New York Times that "These anarchists should have been arrested", while
Lori Wallach of
Public Citizen stated that she had instructed Teamsters to assault black bloc participants.
Barbara Ehrenreich decried the NGO leaders as "hypocrites", and wrote that nonviolent activists ought to be "treating the young rock-throwers like sisters and brothers in the struggle." She also criticized the dominant nonviolent paradigm as "absurdly ritualized". The solution to Ehrenreich's impasse was the growing acceptance of black bloc tactics in the anti-globalization movement. During
protests against the
2010 G20 summit in
Toronto, a black bloc riot damaged a number of retail locations including an
Urban Outfitters,
American Apparel,
Adidas Store, Starbucks and many banking establishments. monument. On the day of President
Donald Trump's
inauguration in 2017, black bloc groups were present among other protests in Washington, D.C., and other places. The groups engaged in vandalism, rioting, and violence. At least 217 were arrested and six police officers sustained minor injuries, and at least one other person was injured. In February 2017, an event at the
University of California, Berkeley by commentator
Milo Yiannopoulos was cancelled by college administrators after
protestors of a black bloc broke windows, shot fireworks, and caused a light fixture to catch fire. The cancellation of the event brought mainstream attention to anarchism and black bloc tactics. In May 2021, Portland protesters in black bloc turned out at multiple rallies and marches that marked the one-year anniversary of the
murder of George Floyd. At one event the protesters wheeled a dumpster into the street and set its contents on fire, drawing police out. The rally was declared a riot by police.
Brazil During the
June–July 2013 mass public demonstrations, groups of people using Black Bloc tactics started attending demonstrations, especially those held across the street from governor of Rio de Janeiro State
Sérgio Cabral Filho's residence and the state government palace. Police face accusations of infiltrating the movement and, at times, acting as agents provocateurs by starting confrontations. Many leftists claim that video footage shows an infiltrated police officer throwing a molotov cocktail that wounded a riot policeman, although this has been denied by the police and hasn't been proven until today (2017). Protester violence occurred regularly during the Brazilian protests (particularly the week of 17 to 21 June) even when not linked with the black bloc, or with police infiltration. Despite the denunciations by media, police, and even some activists, the black bloc tactic persisted in the movement. By October 2013, "The mask-wearers were welcomed by the protesters who wanted to wreak havoc during manifestations... Indeed, this sense of solidarity amidst the demonstrations, this shared manning of barricades, inspires a common determination to fight against the fear of repression." According to a report by two Brazilian leftists published in Al Jazeera, this coincided with a revival in the breadth of the street protests that had not been seen since its early days in June. On 10 October, the Rio teachers' union (Sepe) officially declared support for the recent black bloc actions, stating that the bloc were "welcome" at their demonstrations. Postings on teacher Facebook groups praised bloc participants as "fearless".
Europe On 1 May 2018, over 1,200 black bloc took part in demonstrations in Paris, France. Public infrastructures and stores were damaged. During the demonstrations of the
Yellow vests movement (autumn 2018-spring 2019) major damage was done by black bloc in
Paris,
Toulouse and
Bordeaux. The protest resulting in the most significant amount of property damage took place in Paris when protestors took to the streets on the
Champs-Élysées on 16 March 2019. A group of about 400 black bloc demonstrators took part in the
2011 London anti-cuts protest where they targeted various high end retail outlets; according to journalist
Paul Mason this may have been the largest ever black bloc assembly in the UK. Mason says some of the participants were anarchists from Europe, others were British students who joined the demonstrations after participating in the
2010 UK student protests. A black bloc protested the opening of the
universal exposition Expo 2015 in Milan. Amongst hundreds of thousands of protesters protesting the G20 Summit in Hamburg Germany were thousands of black clad rioters who clashed with police in a 3-day standoff resulting in millions of euros in property damage. At least 500 protestors were injured and more than 200 were arrested.
Egypt On 25 January 2013, on the second anniversary of the
Egyptian Revolution, black blocs made an appearance in the Egyptian political scenes where they reportedly attacked various
Muslim Brotherhood headquarters and government buildings and stopped traffic and metro lines in more than eight cities. A group of young protesters, who identified themselves as the "Black Bloc", have marked the second anniversary of the Egyptian revolution by blocking the tramway tracks in
Alexandria on Friday. Egyptian Prosecutor General Talaat Abdallah ordered the police and armed forces to arrest any participant in the Black Bloc, pointing out that the group was carrying out "terrorist activities" and was considered by the government and under the new constitution a violent radical outlaw group.
Police infiltration On occasion, police and security services have infiltrated black blocs, for purposes of investigation. Allegations first surfaced after several demonstrations. At the 2001
G8 summit in Genoa, among the many complaints about the police there was mention of video footage which "suggests that men in black were seen getting out of police vans near protest marches." In August 2007,
Quebec police admitted that "their officers disguised themselves as demonstrators" in
Montebello. However, the officers purportedly did not engage in violence, and claimed that they were carrying rocks because other protesters were doing so. They were identified by genuine protesters because of their police-issue footwear. According to veteran activist
Harsha Walia, it was other participants in the black bloc who identified and exposed the undercover police. ==Tactics==