guilty of ensuring that Allied war crimes were never "cogently and frankly placed over against the doings, real or alleged, at Auschwitz." Barnes acknowledged that there were concentration camps in Nazi Germany, but denied there were ever death camps. Barnes said that when "court historians" were forced by "revisionists" to admit there were no death camps, the evidence for gas chambers at the death camps was manufactured. Barnes wrote: What is deemed important today is not whether Hitler started war in 1939 or whether Roosevelt was responsible for Pearl Harbour, but the number of prisoners were allegedly done to death in the concentration camps operated by Germany during the war. These camps were first presented as those in Germany, such as Dachau, Belsen, Buchenwald, Sachsenhausen, and Dora, but it was demonstrated that there had been no systematic extermination in those camps. Attention was then moved on to Auschwitz, Treblinka, Belzec, Chelmno, Jonoska, Tarnow, Ravensbrück, Mauthausen, Breznia and Birkenau, which does not exhaust the list that appears to have been extended as needed.Barnes claimed that "court historians", to keep the public from getting "bored", manufactured stories about German crimes against humanity that were "made more unceasing, exaggerated and inflammatory". In response, the German historian Martin Broszat wrote a letter in 1962 clarifying and defining the differences between concentration and death camps. In his letter to the Die Zeit newspaper, Broszat wrote that he wanted to "hammer home, once more, the persistently ignored or denied difference between concentration and extermination camps." In his letter, Broszat claimed this was not an "admission" that there was no Holocaust, but rather an attempt to "set the record straight" about the differences between concentration and death camps. Broszat noted the differences between concentration camps, which were places where the inmates were consistently mistreated, but were not the subject of annihilation, and death camps, which existed solely for the purpose of exterminating their inmates. Broszat denied there was a functioning gas chamber at the Dachau concentration camp (though he noted that one was built shortly before the end of the war as part of the effort to convert Dachau into a death camp, but was never used). Broszat commented that, though there were many concentration camps in Germany, all of the German death camps for the genocide of the European Jews were located in Nazi-occupied Poland. Broszat argued that this confusion in the public's mind between concentration