SMS Kaiserin
SMS  was the third vessel of the  of dreadnought battleships of the Imperial German Navy. s keel was laid in November 1910 at the Howaldtswerke dockyard in Kiel. She was launched on 11 November 1911 and was commissioned into the fleet on 14 May 1913. The ship was equipped with ten  guns in five twin turrets, and had a top speed of . was assigned to III Battle Squadron and later IV Battle Squadron of the High Seas Fleet for the majority of her career, including World War I. Along with her four sister ships, , , , and ,  participated in all of the major fleet operations of World War I, including the Battle of Jutland on 31 May and 1 June 1916. The ship was also involved in Operation Albion, an amphibious assault on the Russian-held islands in the Gulf of Riga, in October 1917. She later saw action during the Second Battle of Heligoland Bight in November 1917. After Germany's defeat in the war and the signing of the Armistice in November 1918, the Royal Navy interned  and most of the capital ships of the High Seas Fleet in Scapa Flow. The ships were disarmed and reduced to skeleton crews while the Allied powers negotiated the final version of the Treaty of Versailles. On 21 June 1919, the commander of the interned fleet, Rear Admiral Ludwig von Reuter, ordered the fleet to be scuttled to ensure that the British would not be able to seize the ships. was raised in May 1936 and subsequently broken up for scrap. Design 

The ship was  long overall and displaced a maximum of  at full load. She had a beam of  and a draft of  forward and  aft. was powered by three sets of Parsons steam turbines, each of which drove a single screw propeller; they were supplied with steam by sixteen coal-fired water-tube boilers. The powerplant produced a top speed of . She carried  of coal, which enabled a maximum range of  at a cruising speed of . was armed with a main battery of ten 30.5 cm SK L/50 guns in five twin turrets. The ship dispensed with the inefficient hexagonal turret arrangement of previous German battleships; instead, three of the five turrets were mounted on the centerline, with two of them arranged in a superfiring pair aft. The other two turrets were placed en echelon amidships, such that both could fire on the broadside. The ship was also armed with a secondary battery of fourteen 15 cm SK L/45 guns in casemates amidships. For close-range defense against torpedo boats, she carried eight  SK L/45 guns in casemates. The ship was also armed with four 8.8 cm L/45 anti-aircraft guns. The ship's armament was rounded out by five  torpedo tubes, all mounted in the hull; one was in the bow, and the other four were on the broadside. Her main armored belt was  thick in the central citadel, and was composed of Krupp cemented armor (KCA). Her main battery gun turrets were protected by  of KCA on the sides and faces. s conning tower was heavily armored, with  sides. Service history 
Ordered under the contract name  as a replacement for the obsolete coastal defense ship ,  was laid down at the Howaldtswerke dockyard in Kiel in November 1910. She was launched on 11 November 1911, after which fitting-out work was completed. At the launching ceremony, Admiral Hans von Koester gave a speech and Princess Victoria Louise christened the ship. A dockyard crew delivered the ship to the Navy on 13 May 1913; she was commissioned into the fleet the following day. During trials the ship's turbine engines were damaged, and  did not join the fleet until 13 December 1913. After joining III Battle Squadron in December 1913,  participated in the routine fleet training exercises. Squadron exercises were conducted in February, followed by fleet maneuvers, both in the North Sea. The fleet trained again in May, in both the North and Baltic Seas. left Germany on 7 July for the annual summer cruise to Norway, but was recalled prematurely on 22 July because of rising international tensions following the assassination of Archduke Franz Ferdinand. Upon returning to Germany,  steamed to Brunsbüttel on 24 July, where she was the first battleship to traverse the recently deepened Kaiser Wilhelm Canal. The voyage required lightening, and in just under twelve hours  exited the locks at Holtenau in Kiel where she met the rest of her squadron. On 31 July, the entire squadron returned to the North Sea via the Canal. At midnight on 4 August, the United Kingdom, with its powerful Grand Fleet, declared war on Germany. was present during the first sortie by the German fleet into the North Sea, which took place on 2–3 November 1914. No British forces were encountered during the operation. A second operation followed on 15–16 December. This sortie was the initiation of a strategy adopted by Admiral Friedrich von Ingenohl, the commander of the High Seas Fleet. Admiral Ingenohl intended to use the battlecruisers of Rear Admiral Franz von Hipper's I Scouting Group to raid British coastal towns to lure out portions of the Grand Fleet where they could be destroyed by the High Seas Fleet. Early on 15 December the fleet left port to raid the towns of Scarborough, Hartlepool, and Whitby. That evening, the German battle fleet of some twelve dreadnoughts—including  and her four sisters—and eight pre-dreadnoughts came to within  of an isolated squadron of six British battleships. However, skirmishes between the rival destroyer screens in the darkness convinced Ingenohl that he was faced with the entire Grand Fleet. Under orders from Kaiser Wilhelm II to avoid risking the fleet unnecessarily, Ingenohl broke off the engagement and turned the battle fleet back toward Germany. went into the Baltic for squadron training from 23 to 29 January 1915. Upon returning to the North Sea, the ship went into drydock in Wilhelmshaven for periodic maintenance, which lasted from 31 January to 20 February. The Kaiser removed Ingenohl from his post on 2 February, following the loss of  at the Battle of Dogger Bank the month before. Admiral Hugo von Pohl succeeded him as the commander of the fleet. Pohl continued the policy of sweeps into the North Sea to destroy isolated British formations. The fleet conducted a series of advances into the North Sea throughout 1915;  was present for the sweeps on 17 to 18 May, 29 to 30 May, 10 August, 11 to 12 September, and 23 to 24 October. III Squadron completed the year with another round of unit training in the Baltic from 5 to 20 December. Pohl's tenure as fleet commander was brief; by January 1916 hepatic cancer had weakened him to the point where he was no longer able to carry out his duties. He was replaced by Vice Admiral Reinhard Scheer in January. Scheer proposed a more aggressive policy designed to force a confrontation with the British Grand Fleet; he received approval from the Kaiser in February. The first of Scheer's operations was conducted the following month, on 5 to 7 March, with an uneventful sweep of the Hoofden. was also present during an advance to the Amrun Bank on 2 to 3 April. The fleet conducted another sortie on 21 to 22 April. Battle of Jutland 

 was present during the fleet operation that resulted in the battle of Jutland which took place on 31 May and 1 June 1916; her commander at the time was  (KzS) Karl Sievers. The German fleet again sought to draw out and isolate a portion of the Grand Fleet and destroy it before the main British fleet could retaliate. During the operation,  was the second ship in VI Division of III Squadron and the seventh ship in the line, directly astern of  and ahead of . VI Division was behind only V Division, consisting of the four s. The eight battleships of the - and es assigned to I and II Divisions in I Squadron followed VI Division. The six elderly pre-dreadnoughts of III and IV Divisions, II Battle Squadron, formed the rear of the formation. Shortly before 16:00, the battlecruisers of I Scouting Group encountered the British 1st Battlecruiser Squadron under the command of Vice Admiral David Beatty. The opposing ships began an artillery duel that saw the destruction of , shortly after 17:00, and , less than half an hour later. At 16:19,  was forced to temporarily stop the turbine on the center shaft, as the condenser had started leaking. The crew were able to restart the engine before  came into action. By this time, the German battlecruisers were steaming south to draw the British ships toward the main body of the High Seas Fleet. At 17:30, the crew of the leading German battleship, , spotted both I Scouting Group and the 1st Battlecruiser Squadron approaching. The German battlecruisers were steaming to starboard, while the British ships steamed to port. At 17:45, Scheer ordered a two-point turn to port to bring his ships closer to the British battlecruisers, and a minute later, the order to open fire was given. At approximately 17:40, the British light cruiser  fired a single torpedo at  at the extreme range of at least , which failed to find its target. After Scheer ordered the fleet to open fire,  briefly engaged the battlecruiser ;  failed to score a hit and by 17:54 New Zealand and the rest of the British battlecruisers had increased speed and moved out of range. The British destroyers  and , which had been disabled earlier in the engagement, lay directly in the path of the advancing High Seas Fleet. and her three sisters fired on Nomad with their secondary guns while the I Squadron battleships dispatched Nestor. At around 19:00, the German battle line came into contact with the 2nd Light Cruiser Squadron;  fired three salvos from her main battery at an unidentified four-funneled cruiser but made no hits. Shortly after 19:00, a shell from the British battlecruiser  disabled the German cruiser ; Rear Admiral Behncke in  attempted to maneuver III Squadron to cover the stricken cruiser. Simultaneously, the British 3rd and 4th Light Cruiser Squadrons began a torpedo attack on the German line; while advancing to torpedo range, they smothered  with fire from their main guns. The eight III Squadron battleships fired on the British cruisers, but even sustained fire from the battleships' main guns failed to drive off the British cruisers. The armored cruisers , , and  joined in the attack on the crippled . Between 19:14 and 19:17, several German battleships and battlecruisers opened fire on Defence and Warrior. initially engaged one of the battleships in the British 5th Battle Squadron and scored a hit; according to s logs, the ship in question was . After three minutes firing at Malaya,  shifted fire to Defence. In short succession, the German dreadnoughts hit Defence with several heavy caliber shells. One salvo penetrated the ship's ammunition magazines and, in a tremendous explosion, destroyed the cruiser. After Defence exploded,  shifted her fire to a target believed to be the battlecruiser . Heavy haze forced  to check fire after two salvos. By 20:00, Scheer ordered the German line to complete a 180-degree turn eastward to disengage from the British fleet. The maneuver, conducted under heavy fire, caused disorganization in the German fleet. had come too close to  and was forced to haul out of line to starboard to avoid a collision. The latter vessel came up alongside  at high speed. As a result,  had to remain out of line and could not return to her assigned position. The turn reversed the order of the German line;  was now the seventh ship from the rear of the German line. At around 23:30, the German fleet reorganized into the night cruising formation. was the eleventh ship, in the center of the 24-ship line. After a series of night engagements between the leading battleships and British destroyers, the High Seas Fleet punched through the British light forces and reached Horns Reef by 04:00 on 1 June. The German fleet reached Wilhelmshaven a few hours later; the I Squadron battleships took up defensive positions in the outer roadstead and , , , and  stood ready just outside the entrance to Wilhelmshaven. The remainder of the battleships and battlecruisers entered Wilhelmshaven, where those that were still in fighting condition replenished their stocks of coal and ammunition. In the course of the battle,  fired one-hundred and sixty 30.5 cm shells and one-hundred and thirty-five 15 cm rounds. She emerged from the battle completely unscathed. Subsequent operations 
In early August,  and the rest of the operational III Squadron units conducted divisional training in the Baltic. On 18 August, Scheer attempted a repeat of the 31 May operation; the two serviceable German battlecruisers— and —supported by three dreadnoughts, were to bombard the coastal town of Sunderland in an attempt to draw out and destroy Beatty's battlecruisers. The rest of the fleet, including , would trail behind and provide cover. On the approach to the English coast during the action of 19 August 1916, Scheer turned north after receiving a false report from a zeppelin about a British unit in the area. As a result, the bombardment was not carried out, and by 14:35, Scheer had been warned of the Grand Fleet's approach and so turned his forces around and retreated to German ports. Another fleet advance followed on 18 to 20 October, though it ended without encountering any British units. Two weeks later, on 4 November,  took part in an expedition to the western coast of Denmark to assist two U-boats,  and , that had become stranded there. The fleet was reorganized on 1 December; the four -class battleships remained in III Squadron, along with the newly commissioned , while the five -class ships, including , were transferred to IV Squadron. While transiting the Kaiser Wilhelm Canal on 14 March 1917,  became grounded. One of her bilge keels was damaged and some  of water entered the ship. Repairs were conducted at the Imperial Dockyard in Kiel from 15 to 18 March. returned to the North Sea on 30 March and remained there on guard duty until 8 June. On 9 June, she went to the Baltic for a month-long series of exercises, which were completed on 2 July. She resumed guard duties in the German Bight on 3 July and continued in this role until 11 September, when  was detached to join the special unit assigned to Operation Albion. Operation Albion 

In early September 1917, following the German conquest of the Russian port of Riga, the German navy decided to eliminate the Russian naval forces that still held the Gulf of Riga. The  (the Navy High Command) planned an operation to seize the Baltic island of Ösel, and specifically the Russian gun batteries on the Sworbe Peninsula. On 18 September, the order was issued for a joint operation with the army to capture Ösel and Moon Islands; the primary naval component was to comprise the flagship, , along with III and IV Battle Squadrons of the High Seas Fleet. Along with nine light cruisers, three torpedo boat flotillas, and dozens of mine warfare ships, the entire force numbered some 300 ships, supported by over 100 aircraft and six zeppelins. The invasion force amounted to approximately 24,600 officers and enlisted men. By this time, IV Battle Squadron had come under the command of Vice Admiral Wilhelm Souchon. Opposing the Germans were the old Russian pre-dreadnoughts  and , the armored cruisers , , and , 26 destroyers, and several torpedo boats and gunboats. The garrison on Ösel numbered some 14,000 men. The operation began on the morning of 12 October, when  and the III Squadron ships engaged Russian positions in Tagga Bay while  and the rest of IV Squadron shelled Russian gun batteries on the Sworbe Peninsula on Ösel. , along with  and , were tasked with silencing the Russian guns at Hundsort on Ösel, which had taken  under fire. The ships opened fire at 05:44, and by 07:45, Russian firing had ceased and German troops were moving ashore. Two days later, Souchon left Tagga Bay with , , and  to support German ground forces advancing on the Sworbe Peninsula. was assigned to suppress a Russian battery at Zerel, though heavy fog delayed her from engaging her target. The Russians opened fire first, which was quickly returned by  and . came to the two ships' assistance; the three battleships fired a total of 120 large-caliber shells over the span of an hour. The fourth Russian salvo straddled , which began to steer erratically to avoid the Russian gunfire. The heavy firing prompted most of the Russian gun crews to flee their posts. On the night of 15 October,  and  were sent to replenish their coal stocks in Putzig. On the 19th, they were briefly joined in Putzig by , which continued on to Arensburg with . The next morning, Vice Admiral Ehrhard Schmidt ordered the special naval unit to be dissolved and returned to the North Sea. In a communique to the naval headquarters, Schmidt noted that " and  can immediately be detached from Putzig to the North Sea." The two ships then proceeded to Kiel via Danzig; after reaching Kiel, they transited the Kaiser Wilhelm Canal back to the North Sea. Final operations 
On 17 November 1917,  and  were assigned to provide cover for II Scouting Group while it conducted a minesweeping operation in the North Sea. Significant British forces, including five battlecruisers and several light cruisers, attacked II Scouting Group; the two battleships immediately steamed to their assistance. In the ensuing Second Battle of Heligoland Bight,  scored a hit on the light cruiser . The battlecruiser  briefly engaged the German dreadnoughts, but both forces withdrew. After the action, Rear Admiral Ludwig von Reuter criticized s commander, KzS Kurt Graßhoff, for lagging too far behind the minesweepers to provide adequate protection. He was subsequently relieved of command of the ship. went into drydock for maintenance on 22 December, and work lasted until 5 February 1918. The ship participated in the fruitless advance to Norway on 23–25 April 1918, which had been intended to intercept a heavily defended convoy between Britain and Norway; faulty German intelligence prevented the Germans from catching the convoy. After returning to port, she resumed guard duties in the German Bight. IV Squadron undertook another training exercise in the Baltic from 18 June to 13 August. A final round of drills took place on 22–28 October. Fate 

 and her four sisters were to have taken part in a final fleet action at the end of October 1918, days before the Armistice was to take effect. The bulk of the High Seas Fleet was to have sortied from its base in Wilhelmshaven to engage the British Grand Fleet; Scheer—by now the Grand Admiral () of the fleet—intended to inflict as much damage as possible on the British navy. The goal was to improve Germany's bargaining position in the imminent peace negotiations, despite the expected casualties. But many of the war-weary sailors felt that the operation would disrupt the peace process and prolong the war. On the morning of 29 October 1918, the order was given to sail from Wilhelmshaven the following day. Starting on the night of 29 October, sailors on  and then on several other battleships mutinied. The unrest ultimately forced Hipper and Scheer to cancel the operation. Informed of the situation, the Kaiser stated, "I no longer have a navy." Following the capitulation of Germany in November 1918, the Allies interned most of the High Seas Fleet, under the command of Rear Admiral Ludwig von Reuter, in the British naval base in Scapa Flow. Prior to the departure of the German fleet, Admiral Adolf von Trotha made clear to Reuter that he could not allow the Allies to seize the ships, under any circumstances. The fleet rendezvoused with the British light cruiser , which led the ships to the Allied fleet that was to escort the Germans to Scapa Flow. The massive fleet consisted of some 370 British, American, and French warships. Once the ships were interned, their guns were disabled through the removal of their breech blocks, and their crews were reduced to 200 officers and enlisted men. The fleet remained in captivity during the negotiations that ultimately produced the Treaty of Versailles. Reuter believed that the British intended to seize the German ships on 21 June 1919, which was the deadline for Germany to have signed the peace treaty. Unaware that the deadline had been extended to the 23rd, Reuter ordered the ships to be sunk at the next opportunity. On the morning of 21 June, the British fleet left Scapa Flow to conduct training maneuvers, and at 11:20 Reuter transmitted the order to his ships. sank at 14:00; she was subsequently raised on 14 May 1936 and broken up later that year in Rosyth. Notes

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Further reading
 

1911 ships
Kaiser-class battleships
Ships built in Kiel
World War I battleships of Germany
World War I warships scuttled at Scapa Flow
Maritime incidents in 1919