Adolf Hitler's authorization for the Euthanasia Program (Operation T4), signed in October 1939 but dated September 1, 1939.
![Adolf Hitler's authorization for the Euthanasia Program (Operation T4), signed in October 1939 but dated September 1, 1939. [LCID: 67072]](https://encyclopedia.ushmm.org/images/large/b03cd0c7-c662-498e-a086-443cf2189d2b.jpg.pagespeed.ce.k0eZL5PrrA.jpg)
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