Glenmorangie, like all distilleries and breweries in Britain, suffered terribly between 1920 and 1950, with Prohibition and then the Great Depression in the United States reducing whisky sales. The distillery was effectively between 1931 and 1936. The depression ended with World War II, but the war effort left fuel and barley in short supply and the distillery was again mothballed between 1941 and 1944. Exports of whisky were important during the war, but enemy action disrupted and destroyed deliveries to the United States and Canada.