Île Longue
Île Longue is a peninsula of the roadstead of Brest in the department of Finistère in the Brittany region. It is the base of the French nuclear ballistic missile submarines, and as such one of the most secretive and heavily defended places in France.
Geography
Île Longue is a peninsula on the commune of Crozon, attached to the Crozon peninsula. its altitude is and has an area of. To the north of the peninsula there are two small islands: Ile des Morts and Ile Trébéron.Originally the isthmus was a mere sand bank, and crossing was only possible at low tide. During the 19th century, it was improved with a stone pathway. During the construction of the strategic base, it was widened, made insubmersible, and changed into a big parking space.
The peninsula is a stone plateau surrounded by cliffs. It harbours several water springs, which made human habitat possible. In the 19th century, three villages were built on the peninsula: Kernalleguen, Kermeur and Bothuelc'h, slightly north.
History
Description of the peninsula in 1895
Quarries
Exploitation of porphyry started in the 18th century. By the end of the 19th century, half a million cobblestones were produced each year. Up to eleven quarries were exploited around the peninsula. The largest, Vengleuz Braz, was located west from Kermeur.Fortifications
With its cliffs, local water resources, isthmus crossable only at low tide and its location defending Brest harbour, Île Longue is an easily defendable, strategic location. It was fortified by Vauban and as to render the roadstead impossible to hold by an enemy fleet and to allow a counter-attack against an enemy landing party attempting to seize Quélern.had a fort constructed at the top of the peninsula around 1776. It featured a hemicircular lower battery with small buildings protected by a ditch, with a bastion and a drawbridge.
In 1879, a wall was built south of the peninsula, as to defend it against the land. It featured a drawbridge defended by a
casemate and two bastions. Remains of the main gate and of the casemate still exist, but are enclosed in the military area, and not accessible to the general public.
First World War
From 1914 to 1919, Île Longue was used as an internment camp for German citizens captured after the seizure of the ship Nieuw Amsterdam, intercepted by the French 2nd Light Squadron on 2 September 1914. From 3–23 September, the 1,500 passengers were interned at Crozon fort and at Brest; from 4 November, they were transferred to a camp built on Île Longue for the occasion. The last prisoners were released on 31 December 1919.Second World War
During the occupation, the Germans used Île Longue as an anti-aircraft battery, which remained active until 1944. Megalithic monuments were destroyed by the construction of bunkers.Île Longue strategic submarine base
In 1965, President Charles de Gaulle chose Île Longue as home for the sea-based component of the Force de frappe. The place was chosen because it was close to a large harbour, yet distant enough to stay out of the public's eye, and was easily controlled and defended. Île Longue is the command centre for France's ballistic missile submarines.Work began in 1967 and took five years. The peninsula was completely changed, as the isthmus was widened and consolidated, and the peninsula itself gained. Two dry docks were built, as well as numerous habitation, engineering and defence buildings, and approximately 24 vertical missile silos. Missiles are assembled just south of the base, at the Guenvénez Missile Storage and Maintenance Area.
In 1972, the base was made operational and the departed for her first patrol. Île Longue has been the base of the ballistic missile submarines of the Force Océanique Stratégique ever since. Maintenance of the submarines is done at Île Longue, as well as storage of the nuclear components. Chemical pyrotechnics for the missiles and conventional warheads are stored in Guenvénez, 4 km away.
The base is divided into three colour-coded zones:
- Zone Blue comprises the security installations and personnel, including the fire department and the Fusiliers Marins responsible for the defence of the site. This zone also comprises offices and catering.
- Zone Red encompasses the pyrotechnics and bunkers to hold nuclear warheads.
- Zone Yellow encompasses the harbour and submarine installations, notably two roofed -long docks. A -long bunker between the two docks is used to load and unload nuclear materials.