The Nazis saw people with disabilities as a burden on society who weakened the purity of the race.
In 1933, the Law for the Prevention of Hereditarily Diseased Offspring, led to the compulsory sterilisation of 400,000 people who were mentally ill, alcoholic, epileptic, deaf or blind.
In 1939, the Nazis ordered a secret programme, known as the T4 programme, to euthanise (murder) children with physical or mental disabilities that led to over 5000 deaths.