Index/Organizations/Aktion T4

Aktion T4

Nazi Germany's programme of euthanasia which claimed 275,000–300,000 victims

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5 results
Dec 9, 2025
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What chemicals were used in Nazi gas chambers and how did they kill victims?

Nazi murderers used mainly two chemical approaches in gas killings: hydrogen cyanide delivered as Zyklon B pellets and carbon monoxide delivered either from cylinders or engine exhaust; Zyklon B (hydr...

Jan 17, 2026
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What was the Nazi T4 euthanasia program and how did it relate to later mass‑murder methods?

Aktion T4 was a state‑directed Nazi “euthanasia” program that identified, transported and murdered tens of thousands of people with mental illness and disabilities beginning in 1939; it used medicaliz...

Jan 18, 2026
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How did it escalate from T4 to the final solution in Nazi Germany?

Aktion T4 began in 1939 as a state-directed "euthanasia" program to eliminate people judged "life unworthy of life," and it became both an ideological laboratory and a technical proving ground whose m...

Jan 17, 2026

How did German churches and public protests influence the official suspension of Aktion T4 in 1941?

The public suspension of Aktion T4 on 24 August 1941 followed a wave of ecclesiastical denunciations and growing public alarm—most famously the sermons of Bishop Clemens August Graf von Galen—which ma...

Feb 1, 2026

How did the Nazi T4 'euthanasia' program expand and how do researchers estimate its death toll?

began in 1939 as a state‑sponsored “euthanasia” policy targeting people judged “life unworthy of life” and was rapidly expanded through bureaucratic centralization, medical legitimization, and covert ...