This chapter describes the repression of the diversity of sexualities and the affirmation of heteronormative and patriarchal sexuality as a central element in dictatorships in the twentieth century.In authoritarian and dictatorial contexts, masculinity and virility serve as a basis for political power. This has led to historical contexts in which misogyny, patriarchy, and heteronormativity are highly valued socially, and diverse sexual practices and gender identities criminalized, with the imprisonment of women who assume roles and actions that are considered outside their remit as women. The first part of the chapter offers examples of how authoritarian regimes, such as Nazi Germany, Fascist Italy, Spain under Franco and Portugal under Salazar, were particularly violent against diverse gender and sexualities. The second part highlights the Dictatorships in Latin America, including the importance of the Cold War and anti-communism and the connection of both with moral issues, founded on doctrines of national security. The final section discusses how LGBTQ+ people, often allied with feminists, started organisations that questioned these repressive discourses and practices, and thus contributed to the end of the dictatorships, although that role has barely been recognized by leftist parties and resistance organisations, in what remains a very tense relationship.