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French battleship Bretagne

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Through World War I, Interwar period and World War II

The ship was significantly modernised in the interwar period, and when she was on active duty, conducted normal peacetime cruises and training manoeuvres in the Mediterranean and the Atlantic Ocean. After World War II broke out in September 1939, Bretagne escorted troop convoys and was briefly deployed to the Atlantic in search of German blockade runners and commerce raiders. Germany invaded France on 10 May 1940 and the French surrendered only six weeks later, at which time the battleship was stationed in Mers-el-Kébir, French Algeria. Fearful that the Germans would seize the French Navy, the British attacked the ships there on 3 July 1940 after the French refused to surrender or demilitarise the fleet; Bretagne was hit four times and exploded, killing the majority of her crew. Her wreck was salvaged in 1952 and broken up for scrap.

Background and description

The Bretagne class of dreadnought battleships was designed as an improved version of the preceding Courbet class with a more powerful armament, but the limited size of French drydocks forced the turrets to be closer to the ends of the ships, adversely affecting their seakeeping abilities. The ships were 166 metres (544 ft 7 in) long overall, had a beam of 27 m (88 ft 7 in) and a mean draught of 9.1 m (29 ft 10 in). They displaced 23,936 tonnes (23,558 long tons) at normal load and 26,600 tonnes (26,200 long tons) at deep load. Their crew numbered 34 officers and 1,159 men as a private ship and increased to 42 officers and 1,208 crewmen when serving as a flagship.

The ships were powered by two licence-built Parsons steam turbine sets, each driving two propeller shafts, using steam provided by twenty-four Niclausse boilers. The turbines were rated at a total of 28,000 metric horsepower (20,594 kW; 27,617 shp) and were designed for a top speed of 21 knots (39 km/h; 24 mph), but none of the ships exceeded 20.6 knots (38.2 km/h; 23.7 mph) during their sea trials. They carried enough coal and fuel oil to give them a range of 4,700 nautical miles (8,700 km; 5,400 mi) at a speed of 10 knots (19 km/h; 12 mph).

The Bretagne class's main battery consisted of ten Canon de 34 cm (13.4 in) modèle 1912 guns mounted in five twin-gun turrets, numbered one to five from front to rear. Two were in a superfiring pair forward, one amidships, and the last two in a superfiring pair aft. The secondary armament consisted of twenty-two Canon de 138 mm (5.4 in) modèle 1910 guns mounted individually in casemates along the length of the hull. She also carried a pair of Canon de 47 mm (1.9 in) modèle 1902 guns mounted in the forward superstructure in single mounts. Five older 47 mm weapons were installed for sub-calibre training, one on each turret roof, before they entered service. The Bretagnes were also armed with a pair of submerged 450 mm (17.7 in) torpedo tubes on each broadside and could stow 20–28 mines below decks. Their waterline belt ranged in thickness from 140 to 250 mm (5.5 to 9.8 in) and was thickest amidships. Armour plate that was 300 mm (11.8 in) thick protected the gun turrets and 160 mm (6.3 in) plates protected the casemates. The curved armoured deck was 40 mm (1.6 in) thick on the flat and 70 mm (2.8 in) on the outer slopes. The armour of the conning tower was 266 mm (10.5 in) thick.

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