In the situation here envisaged Germany would have even greater difficulty in finding the forces necessary to invade Switzerland. The Swiss forces are reasonably efficient and their plan of defence is to withdraw into a "Reduit National" in the mountainous part of Switzerland, where they would, we believe, be a match for the Germans for a considerable time. The Swiss have well prepared plans for the destruction of communications, including the blocking of the St. Gotthard and Simplon tunnels. The Germans would have to reckon on these plans being effective even against a surprise attack by parachute troops and Fifth Columnists.