Manufactured "rumors," designed to mislead and demoralize the German public during the Second World War, were proposed to the British War Cabinet's Joint Intelligence Sub-Committee in October 1941.
"Rumor" number five, which was suggested by the Joint Intelligence Committee [click document to enlarge], is a story that the Germans were using poison gas to secretly kill off their own wounded soldiers.
This document, and other records of this Committee, were
kept secret until earlier this year, when they were
released to the Public Record Office in London. This
document is reproduced in facsimile from The
Independent Magazine (London), March
27, 1993, p. 59.
Important addendum:
Excerpt from the document above:
“At a certain point on the homeward journey [from the Eastern Front] guards and attendants on German hospital trains [for war wounded] are ordered to put their gas masks on. The train then enters a tunnel where it stays for half an hour. When it comes out the wounded are dead.This 1941 suggestion of atrocity propaganda against the Germans, accusing them of mass murdering people by poisonous gas - in this case their own wounded - appeared later in the media in a version very much in line with the original, secret, propaganda directive, quoted above!
Note. This rumour was suggested by the J.I.C.”
See for yourself, 1942 media:
"Works Every Time"
"'It's a sad fact,' said the principal philanthropist of
the grotesque Simon Wiesenthal Center in Los Angeles,
'that Israel and Jewish education and all the other
familiar buzzwords no longer seem to rally Jews behind
the community. The Holocaust, though, works every time.'
His candor was refreshing, even if it was obscene. On
the subject of the extermination of the Jews of Europe,
the Jews of America are altogether too noisy."
— Leon Wieseltier, literary editor of The
New Republic, writing in the issue of May 3, 1993,
p. 20.