National redoubt
A national redoubt is a region a country would retreat to and defend if a main battle is lost or believed to be inevitable. It’s usually in hard-to-defend terrain like mountains or peninsulas and is meant to hold out and support resistance for as long as needed.
Examples (brief, easy to understand)
- Belgium – Antwerp: A fortress belt built between 1859 and 1914, about 95 km around the city. It was Belgium’s planned last stand and held out for 12 days in the 1914 siege.
- Netherlands – Amsterdam/Holland: The official national redoubt was Fortress Amsterdam until 1920, then expanded to Fortress Holland (1920–1940). Neither proved easy to defend, though the earlier Water Line helped in 1672.
- Portugal – Lisbon: Long seen as the last line of defense. Lines of Torres Vedras protected Lisbon in 1809–1810, and later fortifications like the Lisbon Entrenched Camp defended the city; WWII defenses were added, with some parts active into the 1990s.
- Sweden – Karlsborg Fortress: Built to protect the monarchy, government, parliament, and gold reserves if war came to the east coast.
- Germany – Alpenfestung (Alpine Fortress): A WW2 plan to retreat to the Alps from southern Bavaria to northern Italy. It was never fully adopted and was used mainly for propaganda.
- Italy – Valtellina Redoubt: A planned Alpine redoubt for a late-war defense that was never used.
- Switzerland – Swiss National Redoubt: A WWII plan to defend Switzerland by delaying an invasion and retreating to a mountainous Alpine perimeter.
- Austria – Raumverteidigung: A Cold War plan to defend the Alpine region and use guerrilla warfare if attacked.
- China – Kunming: Prepared as a redoubt if Chongqing fell during the Second Sino-Japanese War; the plan was not used, and Taiwan later became the Nationalist last redoubt.
- Japan – Matsushiro Underground HQ: A large underground complex near Nagano intended for government use in case of invasion; it was only partly completed.
- Palestine/Israel context – Haifa/Mount Carmel plans: Some plans imagined fortifying Haifa and surrounding areas if German advances reached Palestine; the plans were not needed after Allied victories.
- Poland – Romanian Bridgehead concept and Lviv capital idea: Some plans favored a last stand around the Romanian Bridgehead or making Lviv the temporary capital, but these were not realized.
- Yugoslavia – Total National Resistance: A defense doctrine for a last stand in central Bosnia with a network of fortified bases and underground facilities, while civilian defense and guerrilla actions would cover the rest.
In short, national redoubts have appeared in many countries, varying from real fortifications to planned last-ditch plans. Some were built and used briefly; others remained theoretical or were never put into action.
This page was last edited on 2 February 2026, at 04:56 (CET).