Gesetz zur Verhütung erbkranken Nachwuchses
Nazi racial theories were soon translated into legislation, most notably with the 1935 Nuremberg Laws and the July 1933 Law for the Prevention of Hereditarily Diseased Offspring. The Aktion T4 euthanasia programme, in which the "Kraft durch Freude" (KdF, literally "Strength Through Joy") youth organization participated, targeted people accused of representing a danger of "degeneration" towards the "Deutsche Volk." Under the race laws, sexual relations between Aryans (cf. Aryan certificate) and non-Aryans known as "Rassenschande" ("race defilement") became punishable by law. To preserve the "racial purity" of the German blood, after the beginning of the war the Nazis extended the race defilement law to include all foreigners (non-Germans).