I want to know the answer to the following question:
Who wired the infrastructure leading into Switzerland?
All the background I'm provided with is that "The Swiss commanders wired the infrastructure leading into the country, and threatening to destroy bridges, railway tunnels and passes in the event of a Nazi invasion, and then they retreated to the heart of the mountain peaks where conditions were harsher and a military invasion would involve difficult and protracted battles.". Is that enough to answer the question?