The Swiss National Redoubt (Schweizer Alpenfestung or Réduit suisse) was a defensive plan developed by the Swiss government beginning in the 1880s to respond to foreign invasion....
encompassed a widely distributed set of fortifications on a general east-west line through the Alps, centering on three major fortress complexes, Fortresses St. Maurice, St. Gotthard and Sargans. These fortresses primarily defended the alpine crossings between Germany and Italy and excluded the industrialized and populated heart of Switzerland.
