Alpine Wall
Alpine Wall
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Alpine Wall

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Alpine Wall

The Alpine Wall (Vallo Alpino) was an Italian system of fortifications along the 1,851 km (1,150 mi) of Italy's northern frontier. Built in the years leading up to World War II at the direction of Italian dictator Benito Mussolini, the defensive line faced France, Switzerland, Austria, and Yugoslavia. It was defended by the "Guardia alla Frontiera" (GaF), Italian special troops.

The Alpine line was similar in concept to other fortifications of the same era, including the Maginot Line of France, the Siegfried Line of Germany, and the National Redoubt of Switzerland.

Italy's land frontiers were in most places mountainous and easily defended, but in the years leading up to World War II, Italy's relations with its neighbours were uneasy. Even in its dealings with its German ally, Italy was concerned about German ambitions towards the province of South Tyrol, inhabited by a German majority.

Due to the rugged nature of the Alpine frontier, defences were confined to passes and observation posts in accessible locations.

Work on the Alpine Wall began in 1931, intended to cover an arc from the Mediterranean coast at Ventimiglia in the west to Fiume on the Adriatic coast in the east. Three zones were designated at increasing distances from the frontier:

Three types of fortifications were provided:

The work, which was carried out in secrecy using Italian labor, was a significant economic burden, resulting in 208 installations with 647 machine guns and fifty artillery pieces. Construction continued until 1942; a report by General Vittorio Ambrosio on 3 October 1942 recorded that 1,475 bunkers had been completed and 450 more were under construction. The forts were armed with a mixture of new weaponry and older equipment from World War I. Provisions were made to deal with the use of poison gas. Much of the armour was obtained from Germany in compensation for Italian military ventures on behalf of the Axis.

Little use was made of the Alpine Wall during World War II. During the Italian invasion of France in 1940, some western forts such as Fort Mont Chaberton exchanged fire with their French counterparts of the Alpine Line. Chaberton was hit by well-hidden French 280mm field mortars on 21 June, suffered disabling damage and the whole mountain was annexed by France in 1947. In addition, some Alpine Wall fortifications were used defensively by Italian and German forces during the Second Battle of the Alps in 1944.

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