The Pride of Switzerland

Switzerland has an enormous navy, whose ships can be folded extremely small and disguised as muesli bars for transport to any part of the globe where Swiss interests may be threatened - which so far has not happened, because the Swiss are interested only in money and keep that entirely under wraps. Nonetheless, the Swiss hold their navy in constant readiness, in cardboard boxes in a potting shed near Lake Lucerne, on which selected fleets can be seen exercising whenever there is enough breeze. Hence the expression "busy as a Swiss admiral".