Îlot du Diable

Tremet is a hamlet on the Roscanvel peninsula in France. The gun batteries located here are part of the defences of the goulet de Brest, forbidding ships from entering the bay of Camaret-sur-Mer. The site had been occupied by the military since 1694 (a battery was probably sited here in Vauban's defensive scheme) and was updated several times in the 18th and 19th centuries. The battery became a heavy anti-aircraft post in 1955 as part of the outer defences of Brest's military fort - part of that battery is still part of the military land around Quélern and not open to the public.

The fort Quélern or réduit de Quélern is a castle and prison in the commune of Roscanvel in France.

Quélern is a hamlet in Roscanvel, in the department of Finistère (Brittany), in western France.

Îlot des Capucins (Islet of the Capuchins) is a rocky islet at the foot of a cliff in the commune of Roscanvel on the Crozon peninsula. Its name comes from a rock near the island, shaped like a praying monk. It has a strategic position at the entrance to the goulet de Brest and so a fort sited on it controlled the whole of Camaret Bay, with views stretching from pointe du Grand Gouin (to the southwest), to fort de Bertheaume (to the northwest). The fort was built in 1848 after plans drawn 150 years earlier by Vauban, built in schist and granite and made up of an underground battery (1890) and a rapid-fire battery (1890) It was linked to the mainland by a bridge in 1859.On the heights overlooking the islet is an upper battery (1885) to the islet's right and left, a platform battery with an underground magazine (1897) and a mortar battery (1889).

The batteries de Kerviniou are artillery batteries built in the late 19th and early 20th centuries, and are made up of an upper battery (1891) and an underground magazine (1891) Located on the Roscanvel peninsula facing the Fort du Mengant, they are a late addition to the defences of the goulet de Brest (a lower battery near the site, dating to 1695, has not yet been found). Demilitarised in 1915, they are open to the public.

Camaret Bay (French: Anse de Camaret) is a small bay on the north coast of Brittany, France. In 1694 it was the site of the battle of Camaret, a naval action between French and English forces, which culminated in a disastrous amphibious landing by the English as part of an attempt to seize the nearby port of Brest.

La pointe de Cornouaille is a cape to the north of the hamlet of Kerviniou in France. They are both situated on the Roscanvel peninsula and, facing as it does the Fort du Mengant, a battery on the point forms part of the defences of the goulet de Brest. Known defences on the site include: Lower battery (1694) - built to plans by Vauban Tour modèle n°1 (1813) - see Tour-modèle type 1811 Batterie de rupture sous roc (1888) Batterie du plateau (1897) Batterie de DCA allemande (1943, German) Torpedo-boat battery (German)

The Childers Incident of 2 January 1793 marked the opening shots between British and French forces during the French Revolutionary Wars, the first phase of a 23-year-long war between the two countries. Following the French Revolution of 1789, diplomatic relations between the Kingdom of Great Britain and the French Republic had steadily deteriorated and France was in political and social turmoil. One of the strongest hotbeds of republican activity was the principal Atlantic naval base of the French Navy at Brest in Brittany, the scene of a significant mutiny in 1790. On 2 January a small British warship, the 14-gun brig HMS Childers under Commander Robert Barlow, was ordered to enter the Roadstead of Brest to reconnoitre the state of readiness of the French fleet. As Childers entered the Goulet de Brest, the vessel came under fire from French batteries flying the tricolour. Although Barlow clearly identified his brig as a neutral British vessel the fire continued until he was able to withdraw. Although Childers had been struck by a 48 lb (22 kg) cannonball, none of the crew were wounded. The incident was of itself inconsequential, with minimal damage and no casualties on either side, but it marked a symbolic moment in the deterioration of relations between Britain and France in the approach to war, which broke out on 1 February 1793.

Roscanvel (French pronunciation: ​[ʁɔskɑ̃vɛl]; Breton: Roskañvel) is a commune in the Finistère department of Brittany in north-western France.

The Tour Vauban (Vauban Tower), initially known as the tour de Camaret, is an 18m-high polygonal defensive tower built to a plan by Vauban on the Sillon at Camaret-sur-Mer, as part of the fortifications of the goulet de Brest. It has three levels and is flanked by walls, a guardhouse and a gun battery which can hold 11 cannons as well as a cannonball foundry added in the French Revolution period. Drafted in 1683, the tower was designed in 1689 by Vauban and construction was supervised by the military engineer Jean-Pierre Traverse from 1693 to completion in 1696. The 11 cannons in the battery are believed to have been forged with those for the battery on pointe du Grand Gouin, for the Quélern defensive-lines and the many neighbouring batteries. In the French victory in the Battle of Camaret on 18 June 1694, the battery and its two guard houses were only armed with nine 24-pounder cannon and three mortars firing 30 cm balls. On 18 June 1694 Vauban himself was in command of the garrison when they repelled an Anglo-Dutch attack. The battery put several British vessels out of action. On land, a charge by French dragoons scattered the British troops that had landed, and the local militia helped complete the victory. The French claimed to have killed 1200 attackers and captured 450 prisoners. Vauban's forces claimed to have only suffered 45 men wounded. British estimates were that they had lost 700 soldiers killed, wounded, and captured, and that 400 men aboard the ships were killed or wounded. A Dutch frigate of 20 guns also was sunk.The Anglo-Dutch fleet anchored between Camaret Bay and Bertheaume. Consequently, Tour Vauban also received some support from Fort de Bertheaume on the opposite side of the Goulet de Brest. Camaret-sur-Mer is a member of the network of major Vauban sites. Since 7 July 2008 the tour Vauban and 11 other sites have been classified as a UNESCO World Heritage Site due to their outstanding engineering and testimony to Vauban's influence on military strategy and architecture from the 17th through the 19th centuries.

The pointe du Grand Gouin is a rocky promontory with vertical cliffs to the west of the inlet of Camaret-sur-Mer in France. It protects a port which, in Vauban's era, was vulnerable to possible landings. It is divided into the Grand Gouin (the top of the cliff) and the Petit Gouin (mid-cliff).

The Goulet de Brest (French pronunciation: ​[ɡulɛ də bʁɛst]) is a 3-km-long strait linking the roadstead of Brest to the Atlantic Ocean. Only 1.8 km wide, the goulet is situated between the Pointe du Petit Minou and the Pointe du Portzic to the north and the îlot des Capucins and the Pointe des Espagnols to the south. At each turn of the tide, the ocean refills the roadstead in a current that can attain 4 to 5 knots. Sailing ships would thus wait in the cove of Camaret-sur-Mer for a favourable current to carry them into the goulet. On 2 January 1793, the Childers Incident – the first shots of the war between Great Britain and France during the French Revolutionary Wars – took place in the goulet.