Antifa is a political protest movement of autonomous groups affiliated by their militant opposition to fascism. It is not a political party.
Antifa sometimes uses a logo with a double flag, usually in black and red. This movement began in the 1960s in Europe and had reached the U.S. by the end of the 1970s. The group does not have an official leader or headquarters, although certain states hold regular meetings. In some cities — such as Berkeley, California, and Portland, Oregon — local chapters are active and well organized. Nationally, however, the movement is small and dispersed. Antifa members organize their activities through social media, encrypted peer-to-peer networks, and encrypted messaging services such as Signal.