The Anarchist flag is sturdy black or red-and-black; it symbolizes resistance in opposition to authoritarianism

https://station-wiki.win/index.php/Beyond_Borders:_Flags_as_Symbols_of_Identity_and_Belonging

The Anarchist flag is good black or red-and-black; it symbolizes resistance against authoritarianism and has roots in a considerable number of social routine at some stage in heritage advocating for freedom from oppressive governments.