While Black people in Nazi Germany were never subject to mass extermination as in the cases of Jews, Romani and Slavs, they were still considered by the Nazis to be an inferior race and, along with Romani people, were subject to the Nuremberg Laws under a supplementary decree.
Even before World War I, Germany struggled with the idea of black Germans. While interracial marriage was legal under German law at the time, beginning in 1890, some colonial officials started refusing to register them, using eugenics arguments about the inferiority of mixed-race children to support their decision. By 1912, this had become official policy in many German colonies, and a debate in the Reichstag over the legality of the interracial marriage bans ensued. A major concern brought up in debate was that mixed-race children born in such marriages would have German citizenship, and could therefore return to Germany with the same rights to vote, serve in the military, and hold public office as white Germans.
After World War I, French occupation forces in the Rhineland included African colonial troops, some of whom fathered children with German women. Newspaper campaigns against the use of these troops focused on these children, dubbed "Rhineland bastards", often with lurid stories of uncivilized African soldiers raping innocent German women. In the Rhineland itself, local opinion of the troops was very different, and the soldiers were described as "courteous and often popular", possibly because French colonial soldiers harbored less ill-will towards Germans than war-weary French occupiers. While subsequent discussions of Afro-German children revolved these "Rhineland Bastards", in fact, only 400–600 children were born to such unions, compared to a total black population of 20,000–25,000 in Germany at the time.
In Mein Kampf, Hitler described children resulting from marriages to African occupation soldiers as a contamination of the white race "by Negro blood on the Rhine in the heart of Europe." He thought that "Jews were responsible for bringing Negroes into the Rhineland, with the ultimate idea of bastardizing the white race which they hate and thus lowering its cultural and political level so that the Jew might dominate." He also implied that this was a plot on the part of the French, since the population of France was being increasingly "negrified".