Operation Tannenbaum Operation Tannenbaum Operation "Tannenbaum ("Fir Tree"), known earlier as Operation "Grün ("Green"), was a planned but cancelled invasion of Switzerland by Nazi Germany and Italy during World War II. For tactical reasons, Adolf Hitler made repeated assurances before the outbreak of the Second World War that Germany would respect Swiss neutrality in the event of a military conflict in Europe. In February 1937, he announced that "at all times, whatever happens, we will respect the inviolability and neutrality of Switzerland" to the Swiss federal councillor Edmund Schulthess, reiterating this promise shortly before the Nazi invasion of Poland. These were, however,
A Twisted Christmas singing. Twisted Sister also filmed a studio performance of "Heavy Metal Christmas" for GameTap. Unusually, this video featured frontman Snider without his makeup. Music critic James C. Monger praised the release for the publication AllMusic. Monger remarked that the band's members "filter the beloved Christmas carol" tradition "through the same makeup-smeared sieve" that brought them earlier success. Arguing that Christmas albums "need to either be pretty good, horrifically terrible, or completely original to cause even the jolliest head to turn", he wrote that "Twisted Christmas" "manages to achieve all three" and constitutes a "collection of yuletide classics". A Twisted Christmas