Hauptamt II officials under Viktor Brack played a vital role in organizing the killing of mentally ill and physically handicapped people in the Action T4 "euthanasia" programme, especially the child "euthanasia" from 1939.
Hauptamt II officials under Viktor Brack were key figures in implementing the systematic persecution and extermination of individuals with disabilities within the Action T4 program, particularly the child euthanasia measure introduced in 1939.