Some Black and mixed-race people were also imprisoned in concentration camps and forced labour camps during the Nazi era. Although, as the historians Robbie Aitken and Eve Rosenhaft explain: ‘the nominal grounds on which Blacks were held make it difficult to assess whether and under what circumstances someone could be arrested for simply being Black’ [Robbie Aitiken and Eve Rosenhaft, Black Germany: The Making and Unmaking of a Disapora Community 1884-1960 (United Kingdom: Cambridge University Press, 2013), 274] , some concentration camp records indicate that race was, at the very least, a significant contributing factor as to why people were incarcerated.