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,
Frank Tannenbaum were met by a phalanx of police and the parish rector, who refused their demands. Tannenbaum and 190 other protesters were arrested; Tannenbaum was charged with inciting to riot and given an extraordinary $5,000 bail. At trial one protester received 60 days in jail, four 30 days, three 15 days, and the rest were let go; Tannenbaum was sent to jail for a year and fined $500. He spent the year on Blackwell's Island. When he got out of jail, Tannenbaum remained active in the IWW, and he was arrested alongside Elizabeth Gurley Flynn and Alexander Berkman during the Bayonne