During 1943 and '44, in response to mass murder rumours repeated by American, British and Soviet newspapers, Allied government leaders gave top priority to discovering what was occurring in Polish detention camps. The four official statements below were widely distributed in Europe by radio broadcasts in German and other languages, by newspapers and by millions of air-dropped leaflets:

1. August 1943, U.S. President Roosevelt stated:

"There have been reports...Axis powers were seriously contemplating the use of poisonous...gases...Use of such weapons is outlawed by...civilized mankind...We shall (not) resort to such use, unless they are first used by our enemies...Any use of poison gas...will be followed by immediate retaliation."

2. November, 1943 Moscow Declaration, Signed By Stalin, Churchill And Roosevelt Said:

"Germans who have shared in slaughter inflicted on peoples of Poland...will be brought back to the scenes of the crimes and judged on the spot."

3. January 25, 1944, President Roosevelt stated:

"It is imperitive that action be taken to forestall the plot of the Nazis to exterminate the Jews ... of Europe."

4. March 24, 1944, President Roosevelt Issued A Statement:

"In one of the blackest crimes of all history...the wholesale systematic murder of the Jews of Europe goes on unabated every hour...That these innocent people...should perish...would be a major tragedy...All who knowingly take part of the deportation of Jews to their death in Poland...are equally guilty with executioner. Let people...do what they can to save (the Jews) from the Nazi hangman."

Conclusion:

In 1943 and '44 U.S. President Roosevelt publicized the Allied government's top priority investigation of the fate of Jewish inmates in Polish camps.

In early 1944, after a thorough investigation using air photos, spy reports and government contacts, Allied military leaders concluded the mass murder rumours could not be confirmed and were therefore, dismissed as some of the many wartime attrocity stories being circulated by the Soviet and Allied media. As a result, Allied leaders did not order the bombing of Auschwitz cremation buildings and guard's quarters, or of any other camp.

As the investigation had top priority, had military leaders felt that even one inmate a day was being murdered by guards at Auschwitz, or other camps, it is almost certain that precision bombing of guard's quarters, cremation buildings, or other facilities would have been ordered.

The fact that no camps were bombed, proves that the 1944 Allied military investigation could not confirm, and therefore dismissed, the mass murder rumours.

References:

Number 25, pages 313-339

Number 6, pages 248-276

Infield, G. Secrets of the SS. Berkley Publishing, N.Y. 1990. Pages 78-79.