SMS Kaiser (1911)
SMS  was the lead ship of the  of dreadnought battleships of the Imperial German Navy.  was built by the Imperial Dockyard at Kiel, launched on 22 March 1911 and commissioned on 1 August 1912. The ship was equipped with ten  guns in five twin turrets, and had a top speed of .  was assigned to III Battle Squadron of the High Seas Fleet for the majority of World War I.

In 1913,  and her sister  conducted a cruise to South America and South Africa. The ship participated in most of the major fleet operations during the war. She fought at the Battle of Jutland on 31 May – 1 June 1916, during which she was hit twice and suffered negligible damage. The ship was also present during Operation Albion in the Baltic Sea in September and October 1917, and at the Second Battle of Heligoland Bight in November 1917.

During peace negotiations after the end of the war in 1918, she was interned with other ships of the High Seas Fleet at Scapa Flow. 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. The wreck was raised in 1929 and broken up in Rosyth in 1930.

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 turbines, 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 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, so that both could fire on the broadside. The ship was also armed with a secondary battery of fourteen  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 ship's 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 Imperial Dockyard in Kiel in September 1909. The hull was completed by 22 March 1911, when the ship was launched; this date was specifically chosen, as it was the birthday of  (Emperor) Wilhelm I. His grandson,  Wilhelm II, attended the launching ceremony, where German Chancellor Theobald von Bethmann Hollweg gave a speech while  (Empress) Augusta Victoria christened the ship. Fitting-out work then began, which was completed by the end of July 1912. On 1 August, the ship was commissioned for sea trials. These were concluded by 7 December; the following day  joined the fleet as the flagship of V Division. Her crew consisted largely of men who had been transferred from the recently decommissioned battleships  and .

After joining the active fleet in December 1912,  was stationed in Kiel. The ship then conducted individual training. In February 1913,  was transferred to Wilhelmshaven, along with her sister ship . She then took part in several training exercises with the rest of the High Seas Fleet. These included maneuvers in the North Sea in March and April, artillery drills in the Baltic at the end of the month, and further fleet maneuvers in May. In June,  took part in the Kiel Week regatta. Kaiser Wilhelm II and Italian King Victor Emmanuel III inspected the ship. The annual summer cruise to Norway was conducted in July and August, followed immediately by the autumn maneuvers in August and September. In September 1913, Captain Adolf von Trotha became the ship's commanding officer, a post he held until January 1916.

 was selected to participate in a long-distance cruise to test the reliability of the new turbine propulsion system. The ship was joined by her sister  and the light cruiser  in a special "Detached Division". The trio departed Germany on 9 December 1913 and proceeded to the German colonies in western Africa. The ships visited Lomé in Togoland, Duala and Victoria in Kamerun, and Swakopmund in German South-West Africa. From Africa, the ships sailed to St. Helena and then on to Rio de Janeiro, arriving on 15 February 1914.  was detached to visit Buenos Aires, Argentina before returning to meet the two battleships in Montevideo, Uruguay. The three ships sailed south around Cape Horn and then north to Valparaiso, Chile, arriving on 2 April and remaining for over a week.

On 11 April, the ships departed Valparaiso for the long journey back to Germany. On the return trip, the ships visited several more ports, including Bahía Blanca, Argentina, before returning to Rio de Janeiro. On 16 May the ships left Rio de Janeiro for the Atlantic leg of the journey; they stopped in Cape Verde, Madeira, and Vigo, Spain while en route to Germany. , , and  arrived in Kiel on 17 June 1914. In the course of the voyage, the ships traveled some . A week later, on 24 June, the Detached Division was dissolved and  returned to III Squadron.  then participated in squadron exercises in July.  joined the High Seas Fleet for its annual summer cruise to Norway in July 1914, about two weeks after the assassination of Archduke Franz Ferdinand in Sarajevo. As a result of rising international tensions, the cruise was cut short and the German fleet was back in Wilhelmshaven by 29 July. At midnight on 4 August, the United Kingdom declared war on Germany.

World War I 

The High Seas Fleet, including , conducted a number of sweeps and advances into the North Sea. The first occurred on 2–3 November 1914, though no British forces were encountered. Admiral Friedrich von Ingenohl, the commander of the High Seas Fleet, adopted a strategy in which the battlecruisers of Rear Admiral Franz von Hipper's I Scouting Group raided British coastal towns to lure out portions of the Grand Fleet where they could be destroyed by the High Seas Fleet. The raid on Scarborough, Hartlepool and Whitby on 15–16 December 1914 was the first such operation. On the evening of 15 December, 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 battlefleet back toward Germany.

Following the loss of  at the Battle of Dogger Bank in January 1915, the Kaiser removed Ingenohl from his post on 2 February. Admiral Hugo von Pohl replaced him as commander of the fleet. Pohl conducted a series of fleet advances in 1915 in which  took part; in the first one on 29–30 March, the fleet steamed out to the north of Terschelling and return without incident. Another followed on 17–18 April, where  and the rest of the fleet covered a mining operation by II Scouting Group. Three days later, on 21–22 April, the High Seas Fleet advanced towards the Dogger Bank, though again failed to meet any British forces.  was in dock in Kiel for periodic maintenance during the operation on 17–18 May, but she was back with the fleet for the sortie on 29–30 May, during which the fleet advanced as far as Schiermonnikoog before being forced to turn back by inclement weather. On 10 August, the fleet steamed to the north of Helgoland to cover the return of the auxiliary cruiser . A month later, on 11–12 September, the fleet covered another mine-laying operation off the Swarte Bank. The last operation of the year, conducted on 23–24 October, was an advance without result in the direction of Horns Reef.

On 12 January 1916, Admiral Reinhard Scheer replaced Pohl as the fleet commander.  was present during the fleet advance on 5–7 March, though this too ended without action. While in port in Kiel, the old pre-dreadnought  accidentally collided with , though neither ship was seriously damaged. Scheer continued the series of fleet operations practiced by his predecessors; the fleet conducted sweeps of the North Sea on 26 March, 2–3 April, and 21–22 April. The battlecruisers conducted another raid on the English coast on 24–25 April, during which  and the rest of the fleet provided distant support. Scheer planned another raid for mid-May, but the battlecruiser  had struck a mine during the previous raid and the repair work forced the operation to be pushed back until the end of the month.

Battle of Jutland 

Almost immediately after the Lowestoft raid, Scheer began planning another foray into the North Sea. He had initially intended to launch the operation in mid-May, by which time the mine damage to  was scheduled to be repaired—Scheer was unwilling to embark on a major raid without his battlecruiser forces at full strength. On 9 May, however, several battleships developed problems with their engines, which delayed the operation further, to 23 May. On 22 May,  was still not fully repaired, and the operation was again postponed, this time to 29 May. At noon on 29 May, the repairs to  were finally completed, and the ship returned to I Scouting Group. The plan called for Hipper's battlecruisers to steam north to the Skagerrak, with the intention of luring out a portion of the British fleet so it could be destroyed by Scheer's waiting battleships.

 and the rest of III Battle Squadron were the leading unit of the High Seas Fleet; the four s led the line. , the flagship of  H. Nordmann, was directly astern of the four s. I Battle Squadron, composed of the eight - and s, followed III Squadron, with the six elderly pre-dreadnoughts of II Battle Squadron bringing up the rear. Hipper's five battlecruisers left the Jade estuary at 02:00 on 31 May; Scheer, with the High Seas Fleet, followed an hour and a half later.

Shortly before 16:00 CET, the battlecruisers of I Scouting Group encountered the British 1st Battlecruiser Squadron, under the command of 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. By this time, the German battlecruisers were steaming south in order to draw the British ships towards the main body of the High Seas Fleet. At 17:30, s crew 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 at 17:46, the order to open fire was given.

Between 17:48 and 17:52, , , , and all eight battleships of I Squadron opened fire on several ships of the 2nd Light Cruiser Squadron; , , and  engaged , though only  managed to score a hit on the cruiser. In the span of eight minutes,  fired eleven salvos at Southampton without success. The 2nd LCS then moved back out of range, having largely escaped unscathed. At 17:58, Scheer ordered the fleet to maximum speed; the greater speed of the s caused the distance between  and  to rapidly increase. At 18:05, Southampton again came into range, and  opened fire.  fired four salvos at a range of , though again without scoring any hits. After three minutes of firing, s guns again fell silent.

Starting at 18:10,  began firing on the 5th Battle Squadron battleship ; in the span of 25 minutes,  fired 27 salvos at an average range of . The British destroyers  and , which had been disabled earlier in the engagement, lay directly in the path of the advancing High Seas Fleet. Shortly before 18:30,  and her three sister ships opened fire on Nomad with their secondary batteries. The hail of 15-cm shells smothered the ship; a fire was started and one shell detonated the ship's forward ammunition magazine. Nomad sank stern first at 18:30. Nestor was meanwhile destroyed by the battleships of I Squadron.

Shortly after 19:00, the German cruiser  had become disabled by a shell from the British battlecruiser ; 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,  and several other battleships and battlecruisers opened fire on Defence and Warrior. Defence was struck by several heavy caliber shells from the German dreadnoughts. One salvo penetrated the ship's ammunition magazines and, in a massive explosion, destroyed the cruiser.

As Warrior limped away to the west, the s of the 5th Battle Squadron joined the Grand Fleet as it entered the battle from the north. However,  was forced to haul out of line to the south, towards the oncoming German fleet. Warspite came under intense fire from the approaching German battleships;  scored a hit on Warspite that damaged her steering gear and forced her to steam in a circle, out of control. After completing two full circles and sustaining 13 heavy hits, Warspite came back under control and rejoined the squadron. However, by 20:00 the steering gear had again failed, so the ship was forced to withdraw from the engagement.

By 20:15, the German fleet had faced the Grand Fleet for a second time and was forced to turn away; in doing so, the order of the German line was reversed.  was now the fifth ship from the rear of the German line, ahead of only the four -class battleships.  was hit twice in quick succession by heavy-caliber shells, at 20:23 and three minutes later. The Common Pointed, Capped, shells came from the  guns of . One shell penetrated the upper deck and landed in a hammock stowage compartment below the No. 7 casemate; the shell failed to explode and instead broke up on impact, starting a small fire that was quickly put out. The other shell probably exploded outside the ship.

Shortly before 21:30, , , and  spotted British light forces approaching. The German ships opened fire at a range of around  with both their main and secondary armament. The light cruiser  was badly damaged, which forced the British ships to withdraw. At around 23:30, the German fleet reorganized into the night cruising formation.  was the twelfth 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. The two shell hits suffered by  had been largely ineffectual, wounding only one crewmember.

Subsequent operations 
On 18 August, Admiral 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. The British were aware of the German plans and sortied the Grand Fleet to meet them, leading to the action of 19 August 1916. By 14:35, Admiral Scheer had been warned of the Grand Fleet's approach and, unwilling to engage the whole of the Grand Fleet just eleven weeks after the decidedly close call at Jutland, turned his forces around and retreated to German ports.

Another fleet advance followed on 18–20 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. On 1 December, the High Seas Fleet was reorganized;  and her sisters were transferred to the newly created IV Battle Squadron, with  as the flagship. In 1917, the policy of unrestricted submarine warfare was reinstated; the surface units of the German navy were therefore tasked with covering the departures and arrivals of the U-boats. As a result,  spent most of the year on picket duty in the German Bight. In May 1917,  went into the dock for periodic maintenance.

Operation Albion 

In early September 1917, following the German Army's conquest of the Russian port of Riga, the 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 organized into a Special Unit, which comprised the flagship, , along with IV Battle Squadron of the High Seas Fleet. IV Squadron was composed of V and VI Divisions. V Division included the four -class ships, and was by this time augmented with the new battleship . VI Division consisted of the five -class battleships. Along with 9 light cruisers, 3 torpedo boat flotillas, and dozens of mine warfare ships, the entire force numbered some 300 ships, supported by over 100 aircraft and 6 zeppelins. The invasion force amounted to approximately 24,600 officers and enlisted men. 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.

On 24 September,  left Kiel, bound for the Putziger Wiek, where she rendezvoused with several other battleships. From there, the ship went to Libau, which she reached on 10 October. Two days later, on the morning of 12 October, , joined by her sisters  and , opened fire on the Russian shore batteries at Cape Hundsort. On 14 October  engaged the Russian destroyer  and disabled the ship's engine with a single hit.  was captured and taken in tow, but she quickly foundered.  then bombarded Russian positions on Cape Toffri on 16 October.

By 20 October, the fighting on the islands was winding down; Moon, Ösel, and Dagö were in German possession. The previous day, the  had ordered the cessation of naval actions and the return of the dreadnoughts to the High Seas Fleet as soon as possible. On 31 October  and the rest of the Special Unit were detached from the operation and sent back to Kiel, which they reached by 2 November.  was back in the North Sea on 7 November.

Final operations 
 and  were assigned to security duty in the Bight on 17 November; they were tasked with providing support to II Scouting Group (II SG) and several minesweepers. Two British light cruisers,  and , attacked the minesweepers and II SG in the Second Battle of Helgoland Bight.  and her sister intervened and hit one of the light cruisers. The two ships briefly engaged the battlecruiser , but neither side scored any hits and the German commander failed to press the attack.

On 2 February 1918, the light cruiser  struck a mine;  was among those ships that sortied to escort the damaged cruiser back to port. The ship was also present during the fleet advance on 23–24 April. The operation was intended to intercept a heavily escorted British convoy to Norway on 23–25 April, though the operation was canceled when the battlecruiser  suffered mechanical damage. In the final months of the war, Captain Hermann Bauer took command of the ship; his period in command lasted from August to November.

 was to have taken part in a final fleet action days before the Armistice, an operation which envisioned the bulk of the High Seas Fleet sortieing from their base in Wilhelmshaven to engage the British Grand Fleet. In order to retain a better bargaining position for Germany, Admirals Hipper and Scheer intended to inflict as much damage as possible on the British navy, whatever the cost to the fleet. Consequently, on 29 October 1918, the order was given to depart from Wilhelmshaven to consolidate the fleet in the Jade roadstead, with the intention of departing the following morning. However, starting on the night of 29 October, sailors on  mutinied. The unrest spread to other battleships, which forced Hipper and Scheer to cancel the operation.

Fate 

Following the capitulation of Germany in November 1918, most of their fleet ships were interned in the British naval base in Scapa Flow under the command of Rear Admiral Ludwig von Reuter. 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 conditions. 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 flotilla 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. The fleet remained in captivity during the negotiations that ultimately produced the Versailles Treaty.

A copy of The Times informed Reuter that the Armistice was to expire at noon on 21 June 1919, the deadline by which Germany was to have signed the peace treaty. Reuter came to the conclusion that the British intended to seize the German ships after the Armistice expired. Unaware that the deadline had been extended to the 23rd, Reuter ordered the ships to be sunk. 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 13:24; the ship was raised in 1929 and broken up for scrap in Rosyth starting in 1930.

Notes

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Further reading
 

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