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,
Emmanuel David Tannenbaum subsequently devoted his research to studying various problems in evolutionary dynamics using quasispecies models. His seminal work centered on the key question of the evolutionary advantages of sexual reproduction. Tannenbaum demonstrated a strong selective advantage for sexual reproduction with fewer and much less restrictive assumptions than previously considered. Closely related to this line of reasoning, was the original work by Tannenbaum and James Sherley on the immortal strand hypothesis. Tannenbaum also proposed a pioneering theory of why higher organisms need sleep. Towards the end of his life, he proposed a new approach to anti-stealth technology based on the theory of