This was the backbone of the Air Force of Switzerland between 194ß-1945. Well in the 30s Switzerland became a fortress and many auxillery airports In 1938 Messerschmitt Bf 109D and Me 109E-3 came in to the inventory of the "Schweizer Fliegertruppe" ... Swiss Air Force. But the french Morane Saulnier M.S. 406 was built under license license in Switzerland. She was in this time the most numerous fighter in Switzerland, despite she was obsolescent.
https://en.wikipedia.org/wiki/History_o ... _Air_Force
https://en.wikipedia.org/wiki/Morane-Saulnier_M.S.406
