In the late 1930s and all during WWII, clothes with an Alpine (or Bavarian, or Austrian, or Tyrolean) flavor were very popular. This has always struck me as being a bit odd, especially after it was clear that the US was going to war with Germany, and these clothes were so reminiscent of German folk dress.
I've posted photos of my mini-colllection of 1930s and 40s Alpine fashions at the Vintage Traveler, and you can read my thoughts about this trend.