1944, when the Wehrmacht invaded Hungary. Very soon, Eichmannwith the collaboration of Hungarian authoritieswould send 600,000 Jews of Hungary (and parts of Czechoslovakia, Romania, and Yugoslavia occupied by Hungary) to be murdered in the extermination camps, primarily Auschwitz. Heydrich spoke for nearly an hour. Then followed about thirty minutes of questions and comments, followed by some less formal conversation. Otto Hofmann (head of the SS Race and Settlement Main Office; RuSHA) and Wilhelm Stuckart (State Secretary of the Interior Ministry) pointed out the legalistic and administrative difficulties over mixed marriages, and suggested compulsory dissolution of mixed marriages or the wider use of sterilisation as a simpler alternative. Erich Neumann from the Four Year Plan argued for the exemption of Jews who were working in industries vital to the war effort and for whom no replacements were available. Heydrich assured him that this was already the policy; such Jews would not be killed. Josef Bühler, State Secretary of the General Government, stated his support for the plan and his hope that the killings would commence as soon as possible. Towards the end of the meeting cognac was served, and after that the conversation became less restrained. "The gentlemen were standing together, or sitting together", Eichmann said, "and were discussing the subject quite bluntly, quite differently from the language which I had to use later in the record. During the conversation they minced no words about it at all ... they spoke about methods of killing, about liquidation, about extermination". Eichmann recorded that Heydrich was pleased with the course of the meeting. He had expected a lot of resistance, Eichmann recalled, but instead, he had found "an atmosphere not only of agreement on the part of the participants, but more than that, one could feel an agreement which had assumed a form which had not been expected". Eichmann's list Wannsee Protocol At the conclusion of the meeting Heydrich gave Eichmann firm instructions about what was to appear in the minutes. They were not to be verbatim: Eichmann ensured that nothing too explicit appeared in them. He said at his trial: "How shall I put it – certain over-plain talk and jargon expressions had to be rendered into office language by me". Eichmann condensed his records into a document outlining the purpose of the meeting and the intentions of the regime. He stated at his trial that it was personally edited by Heydrich,