Political symbolism is symbolism that is used to represent a political standpoint. The symbolism can occur in various media including banners, acronyms, pictures, flags, mottos, and countless more. For example, Red flags have traditionally been flown by socialists, left-wing radicals, and communist groups to represent the "blood of the workers". Black flags have traditionally been flown by anarchism, and left-wing radicals to represent the absence of all oppressive structures. A combination of the two colors in a black flag represents social anarchism, such as anarchist communism and anarcho syndicalism.