Much of this handbook recounts the efforts of antifa groups throughout Europe and North America, such as Rock Against Racism, a collection of left-wing punk acts in Britain and the United States; the Red Warriors, French radical martial-arts fighters who patrol the streets in search of skinheads; anarchist motorcycle squads in Greece that protect immigrant neighborhoods from racist attacks; and the German Autonomen, popularizers of the “black bloc” activist hallmarks of masks, dark clothes and clubs — “a uniform, anonymous mass of revolutionaries prepared to carry out militant actions.” The Autonomen managed to shut down rallies and celebrations marking Adolf Hitler’s 100th birthday in 1989.