Answer by Balaji Viswanathan:As others mentioned Switzerland was involved in wars until the 19th century. During both the World Wars, many European nations remained neutral - Switzerland, Sweden and Portugal among the most important. read more
Between the Alps and a Hard Place: Switzerland in World War II and the Rewriting of History, (2013) ISBN 0-89526-238-X excerpt and text search; Kreis, Georg. Switzerland and the Second World War (2013) excerpt and text search; Schelbert, Leo, ed. Switzerland Under Siege 1939–1945, editor ISBN 0-89725-414-7; Wylie, Neville. read more