HMS Conqueror was the third of four dreadnought battleships built for the Royal Navy in the early 1910s. She spent the bulk of her career assigned to the Home and Grand Fleets. Aside from participating in the failed attempt to intercept the German ships that had bombarded Scarborough, Hartlepool and Whitby in late 1914, the Battle of Jutland in May 1916 and the inconclusive action of 19 August, her service during World War I generally consisted of routine patrols and training in the North Sea.

After the Grand Fleet was dissolved in early 1919, Conqueror was transferred back to the Home Fleet for a few months before she was assigned to the Reserve Fleet. The ship was sold for scrap in late 1922 and subsequently broken up.

Design and description The Orion-class ships were designed in response to the beginning of the Anglo-German naval arms race and were much larger than their predecessors of the to accommodate larger, more powerful guns and heavier armour. In recognition of these improvements, the class was sometimes called "super-dreadnoughts". The ships had an overall length of , a beam of and a deep draught of . They displaced at normal load and at deep load as built; by 1918 Conquerors deep displacement had increased to .Burt, p. 136 Her crew numbered 752 officers and ratings.Preston, p. 28

The Orion class was powered by two sets of Parsons direct-drive steam turbines, each driving two shafts, using steam provided by eighteen Babcock & Wilcox boilers. The turbines were rated at and were intended to give the battleships a speed of .Parkes, p. 525 During her sea trials on 7 June 1912, Conqueror reached a maximum speed of from . The ships carried enough coal and fuel oil to give them a range of at a cruising speed of .Burt, pp. 136, 139–140

Armament and armour

The Orion class was equipped with 10 breech-loading (BL) Mark V guns in five hydraulically powered twin-gun turrets, all on the centreline. The turrets were designated 'A', 'B', 'Q', 'X' and 'Y', from front to rear. Their secondary armament consisted of 16 BL Mark VII guns. These guns were split evenly between the forward and aft superstructure, all in single mounts. Four 3-pounder () saluting guns were also carried. The ships were equipped with three 21-inch (533 mm) submerged torpedo tubes, one on each broadside and another in the stern, for which 20 torpedoes were provided.

The Orions were protected by a waterline armoured belt that extended between the end barbettes. Their decks ranged in thickness between and 4 inches with the thickest portions protecting the steering gear in the stern. The main battery turret faces were thick, and the turrets were supported by barbettes.Burt, pp. 134, 136, 139

Modifications In 1914 the shelter-deck guns were enclosed in casemates. By October 1914, a pair of anti-aircraft (AA) guns had been added.Friedman, pp. 123, 199 A fire-control director was installed on a platform below the spotting top before May 1915.Brooks, p. 168 Additional deck armour was added after the Battle of Jutland in May 1916. Around the same time, three 4-inch guns were removed from the aft superstructure.Burt, p. 140 Two flying-off platforms were fitted aboard the ship during 1917–1918; these were mounted on 'B' and 'X' turret roofs and extended onto the gun barrels. A high-angle rangefinder was fitted in the forward superstructure by 1921.Burt, p. 142; Friedman, pp. 123, 198–200, 205

Construction and career Conqueror, named after a French fire ship, , that had been captured in 1745,Silverstone, p. 223 was the seventh ship of her name to serve in the Royal Navy.Colledge, p. 76 The ship was laid down by William Beardmore and Company at their shipyard in Dalmuir on 5 April 1910 and launched on 1 May 1911. She was commissioned with a partial crew on 23 November 1912, but was not completed until March 1913, after which the remainder of her crew arrived.Burt, p. 150 Including her armament, her cost is variously quoted at £1,891,164 or £1,860,648. The last of the four Orions to be completed, Conqueror and her sister ships comprised the Second Division of the 2nd Battle Squadron (BS) of the Home Fleet.Parkes, p. 528

World War I

Between 17 and 20 July 1914, Conqueror took part in a test mobilisation and fleet review as part of the British response to the July Crisis. Arriving in Portland on 25 July, she was ordered to proceed with the rest of the Home Fleet to Scapa Flow four days later to safeguard the fleet from a possible surprise attack by the Imperial German Navy.Massie, p. 19 In August 1914, following the outbreak of World War I, the Home Fleet was reorganised as the Grand Fleet, and placed under the command of Admiral Sir John Jellicoe.Preston, p. 32 Repeated reports of submarines in Scapa Flow led Jellicoe to conclude that the defences there were inadequate and he ordered that the Grand Fleet be dispersed to other bases until the defences be reinforced. On 16 October the 2nd BS was sent to Loch na Keal on the western coast of Scotland. The squadron departed for gunnery practice off the northern coast of Ireland on the morning of 27 October and the dreadnought struck a mine, laid a few days earlier by the German auxiliary minelayer . Thinking that the ship had been torpedoed by a submarine, the other dreadnoughts were ordered away from the area, while smaller ships rendered assistance. On the evening of 22 November 1914, the Grand Fleet conducted a fruitless sweep in the southern half of the North Sea; Conqueror stood with the main body in support of Vice-Admiral David Beatty's 1st Battlecruiser Squadron. The fleet was back in port in Scapa Flow by 27 November.Goldrick, p. 156; Jellicoe, pp. 143–144, 148, 163–165

Bombardment of Scarborough, Hartlepool, and Whitby

The Royal Navy's Room 40 had intercepted and decrypted German radio traffic containing plans for a German attack on Scarborough, Hartlepool and Whitby in mid-December using the four battlecruisers of Konteradmiral (Rear-Admiral) Franz von Hipper's I Scouting Group. The radio messages did not mention that the High Seas Fleet with fourteen dreadnoughts and eight pre-dreadnoughts would reinforce Hipper. The ships of both sides departed their bases on 15 December, with the British intending to ambush the German ships on their return voyage. They mustered the six dreadnoughts of Vice-Admiral Sir George Warrender's 2nd BS, including Conqueror and her sisters and Monarch, and Beatty's four battlecruisers.Tarrant, pp. 28–30

The screening forces of each side blundered into each other during the early morning darkness of 16 December in heavy weather. The Germans got the better of the initial exchange of fire, severely damaging several British destroyers, but Admiral Friedrich von Ingenohl, commander of the High Seas Fleet, ordered his ships to turn away, concerned about the possibility of a massed attack by British destroyers in the dawn's light. A series of miscommunications and mistakes by the British allowed Hipper's ships to avoid an engagement with Beatty's forces.Goldrick, pp. 200–14

1915–1916 The Grand Fleet conducted another fruitless sweep of the North Sea in late December and, while trying to enter Scapa Flow in a Force 8 gale and minimal visibility, Monarch was accidentally rammed by Conqueror on 27 December. The former had to unexpectedly manoeuvre to avoid a guardship at the entrance and Conqueror could not avoid her. The latter ship's bow was badly damaged and she received temporary repairs at Scapa and Invergordon before proceeding to Devonport for full repairs, rejoining the Grand Fleet in March 1915.Burt, p. 150; Goldrick, p. 242

On 11 April, the Grand Fleet conducted a patrol in the central North Sea and returned to port on 14 April; another patrol in the area took place on 17–19 April, followed by gunnery drills off Shetland on 20–21 April. Jellicoe's ships swept the central North Sea on 17–19 May and 29–31 May without encountering any German vessels. During 11–14 June, the fleet conducted gunnery practice and battle exercises west of ShetlandJellicoe, pp. 211–12, 217–19, 221–22 and more training off Shetland beginning on 11 July. The 2nd BS conducted gunnery practice in the Moray Firth on 2 August and then returned to Scapa Flow. On 2–5 September, the fleet went on another cruise in the northern end of the North Sea and conducted gunnery drills. Throughout the rest of the month, the Grand Fleet conducted numerous training exercises. The ship, together with the majority of the Grand Fleet, conducted another sweep into the North Sea from 13 to 15 October. Almost three weeks later, Conqueror participated in another fleet training operation west of Orkney during 2–5 November and repeated the exercise at the beginning of December.Jellicoe, pp. 228, 234–35, 243, 246, 250, 253, 257–58

The Grand Fleet sortied in response to an attack by German ships on British light forces near Dogger Bank on 10 February 1916, but it was recalled two days later when it became clear that no German ships larger than a destroyer were involved. The fleet departed for a cruise in the North Sea on 26 February; Jellicoe had intended to use the Harwich Force to sweep the Heligoland Bight, but bad weather prevented operations in the southern North Sea. As a result, the operation was confined to the northern end of the sea. Another sweep began on 6 March, but had to be abandoned the following day as the weather grew too severe for the escorting destroyers. On the night of 25 March, Conqueror and the rest of the fleet sailed from Scapa Flow to support Beatty's battlecruisers and other light forces raiding the German Zeppelin base at Tondern. By the time the Grand Fleet approached the area on 26 March, the British and German forces had already disengaged and a strong gale threatened the light craft, so the fleet was ordered to return to base. On 21 April, the Grand Fleet conducted a demonstration off Horns Reef to distract the Germans while the Imperial Russian Navy relaid its defensive minefields in the Baltic Sea.Jellicoe, pp. 270–71, 275, 279–80, 284, 286 The fleet returned to Scapa Flow on 24 April and refuelled before proceeding south in response to intelligence reports that the Germans were about to launch a raid on Lowestoft, but only arrived in the area after the Germans had withdrawn. On 2–4 May, the fleet conducted another demonstration off Horns Reef to keep German attention focused on the North Sea.Jellicoe, pp. 286–90

Battle of Jutland

In an attempt to lure out and destroy a portion of the Grand Fleet, the High Seas Fleet, composed of sixteen dreadnoughts, six pre-dreadnoughts and supporting ships, departed the Jade Bight early on the morning of 31 May. The fleet sailed in concert with Hipper's five battlecruisers. Room 40 had intercepted and decrypted German radio traffic containing plans of the operation. In response the Admiralty ordered the Grand Fleet, totalling some 28 dreadnoughts and 9 battlecruisers, to sortie the night before to cut off and destroy the High Seas Fleet.Tarrant, pp. 54–55, 57–58