Bayern class battleship
Encyclopedia
The Bayern class was a class
Ship class
A ship class is a group of ships of a similar design. This is distinct from a ship-type, which might reflect a similarity of tonnage or intended use. For example, the is a nuclear aircraft carrier of the Nimitz class....

 of four super-dreadnought battleship
Battleship
A battleship is a large armored warship with a main battery consisting of heavy caliber guns. Battleships were larger, better armed and armored than cruisers and destroyers. As the largest armed ships in a fleet, battleships were used to attain command of the sea and represented the apex of a...

s built by the German
German Empire
The German Empire refers to Germany during the "Second Reich" period from the unification of Germany and proclamation of Wilhelm I as German Emperor on 18 January 1871, to 1918, when it became a federal republic after defeat in World War I and the abdication of the Emperor, Wilhelm II.The German...

 Kaiserliche Marine
Kaiserliche Marine
The Imperial German Navy was the German Navy created at the time of the formation of the German Empire. It existed between 1871 and 1919, growing out of the small Prussian Navy and Norddeutsche Bundesmarine, which primarily had the mission of coastal defense. Kaiser Wilhelm II greatly expanded...

 (Imperial Navy). The class comprised , , Sachsen, and Württemberg. Construction started on the ships shortly before World War I
World War I
World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

; Baden was laid down in 1913, Bayern and Sachsen followed in 1914, and Württemberg, the final ship, was laid down in 1915. Only Baden and Bayern were completed, due to shipbuilding priorities changing as the war dragged on. It was determined that U-boat
U-boat
U-boat is the anglicized version of the German word U-Boot , itself an abbreviation of Unterseeboot , and refers to military submarines operated by Germany, particularly in World War I and World War II...

s were more valuable to the war effort, and so work on new battleships was slowed and ultimately stopped altogether. As a result, Bayern and Baden were the last German battleships completed by the Kaiserliche Marine.

Bayern and Baden were commissioned into the fleet in July 1916 and March 1917, respectively. This was too late for either ship to take part in the Battle of Jutland
Battle of Jutland
The Battle of Jutland was a naval battle between the British Royal Navy's Grand Fleet and the Imperial German Navy's High Seas Fleet during the First World War. The battle was fought on 31 May and 1 June 1916 in the North Sea near Jutland, Denmark. It was the largest naval battle and the only...

 on 31 May and 1 June 1916. Bayern was assigned to the naval force that drove the Imperial Russian Navy
Imperial Russian Navy
The Imperial Russian Navy refers to the Tsarist fleets prior to the February Revolution.-First Romanovs:Under Tsar Mikhail Feodorovich, construction of the first three-masted ship, actually built within Russia, was completed in 1636. It was built in Balakhna by Danish shipbuilders from Holstein...

 from the Gulf of Riga
Gulf of Riga
The Gulf of Riga, or Bay of Riga, is a bay of the Baltic Sea between Latvia and Estonia. According to C.Michael Hogan, a saline stratification layer is found at a depth of approximately seventy metres....

 during Operation Albion
Operation Albion
Operation Albion was the German land and naval operation in September-October 1917 to invade and occupy the Estonian islands of Saaremaa , Hiiumaa and Muhu , then part of the Russian Republic...

 in October 1917, though the ship was severely damaged from a mine
Naval mine
A naval mine is a self-contained explosive device placed in water to destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, an enemy vessel...

 and had to be withdrawn to Kiel
Kiel
Kiel is the capital and most populous city in the northern German state of Schleswig-Holstein, with a population of 238,049 .Kiel is approximately north of Hamburg. Due to its geographic location in the north of Germany, the southeast of the Jutland peninsula, and the southwestern shore of the...

 for repairs. Baden replaced as the flagship
Flagship
A flagship is a vessel used by the commanding officer of a group of naval ships, reflecting the custom of its commander, characteristically a flag officer, flying a distinguishing flag...

 of the High Seas Fleet
High Seas Fleet
The High Seas Fleet was the battle fleet of the German Empire and saw action during World War I. The formation was created in February 1907, when the Home Fleet was renamed as the High Seas Fleet. Admiral Alfred von Tirpitz was the architect of the fleet; he envisioned a force powerful enough to...

, but saw no combat. Both vessels were interned in Scapa Flow
Scapa Flow
right|thumb|Scapa Flow viewed from its eastern endScapa Flow is a body of water in the Orkney Islands, Scotland, United Kingdom, sheltered by the islands of Mainland, Graemsay, Burray, South Ronaldsay and Hoy. It is about...

 following the Armistice
Armistice with Germany (Compiègne)
The armistice between the Allies and Germany was an agreement that ended the fighting in the First World War. It was signed in a railway carriage in Compiègne Forest on 11 November 1918 and marked a victory for the Allies and a complete defeat for Germany, although not technically a surrender...

 in November 1918. Rear Admiral Ludwig von Reuter
Ludwig von Reuter
Ludwig von Reuter was a German admiral during World War I, who commanded the Imperial German Navy's High Seas Fleet when it was interned at Scapa Flow at the end of the war. On 21 June 1919 he ordered the scuttling of the fleet to prevent the British from seizing the ships.-Early life:Reuter was...

, the commander of the interned German fleet, ordered his ships be sunk
Scuttling of the German fleet in Scapa Flow
The scuttling of the German fleet took place at the Royal Navy's base at Scapa Flow, in Scotland, after the end of the First World War. The High Seas Fleet had been interned there under the terms of the Armistice whilst negotiations took place over the fate of the ships...

 on 21 June 1919; Bayern was successfully scuttled, though British guards managed to beach Baden to prevent her from sinking. The ship was eventually expended as a gunnery target in 1921. Sachsen and Württemberg, both at various stages of completion when the war ended, were broken up for scrap metal.

Design

The Bayern class ships were a result of the fourth Naval Law, which was passed in 1912. Admiral Alfred von Tirpitz
Alfred von Tirpitz
Alfred von Tirpitz was a German Admiral, Secretary of State of the German Imperial Naval Office, the powerful administrative branch of the German Imperial Navy from 1897 until 1916. Prussia never had a major navy, nor did the other German states before the German Empire was formed in 1871...

 used public outcry over the British involvement in the Agadir Crisis
Agadir Crisis
The Agadir Crisis, also called the Second Moroccan Crisis, or the Panthersprung, was the international tension sparked by the deployment of the German gunboat Panther, to the Moroccan port of Agadir on July 1, 1911.-Background:...

 of 1911 to pressure the Reichstag
Reichstag (German Empire)
The Reichstag was the parliament of the North German Confederation , and of the German Reich ....

 into appropriating additional funds for the Navy. The Fourth Naval Law secured funding for three new dreadnoughts, two light cruiser
Light cruiser
A light cruiser is a type of small- or medium-sized warship. The term is a shortening of the phrase "light armored cruiser", describing a small ship that carried armor in the same way as an armored cruiser: a protective belt and deck...

s, and an increase of an additional 15,000 officers and men in the ranks of the Navy for 1912. The capital ships laid down in 1912 were the s; funding for Bayern and Baden was allocated the following year. Funding for Sachsen was allocated in the 1914 budget, while Württemberg was funded in the War Estimates. The last remaining class pre-dreadnought
Pre-dreadnought
Pre-dreadnought battleship is the general term for all of the types of sea-going battleships built between the mid-1890s and 1905. Pre-dreadnoughts replaced the ironclad warships of the 1870s and 1880s...

, , was to be replaced, as well as two elderly class pre-dreadnoughts, and . Baden was ordered as Ersatz Wörth, Württemberg as Ersatz Kaiser Wilhelm II, and Sachsen as Ersatz Kaiser Friedrich III; Bayern was regarded as an addition to the fleet, and was ordered under the provisional name "T".All German ships were ordered under provisional names; additions to the fleet were given a letter, while ships that were intended to replace older vessels were ordered as "Ersatz
Ersatz
Ersatz means 'substituting for, and typically inferior in quality to', e.g. 'chicory is ersatz coffee'. It is a German word literally meaning substitute or replacement...

 (ship name)." An example of this practice is the s: the lead ship
Lead ship
The lead ship or class leader is the first of a series or class of ships all constructed according to the same general design. The term is applicable military ships and larger civilian craft.-Overview:...

  was considered an addition to the fleet, and was ordered as "K", while her sisters and were ordered as Ersatz Kaiserin Augusta and Ersatz Hertha, being replacements for two older ships. See: Gröner, p. 56


The design for the ships was drawn up between 1910 and 1912. Consideration was given to equipping the new ships with triple turrets mounting the 30.5 cm (12 in) guns of the preceding s, but after examining the gun turrets of the Austro-Hungarian dreadnoughts of the , it was determined that the triple gun turrets still had too many problems. Among these deficiencies were increased weight, reduced ammunition supply and rate of fire, and loss of fighting capability if one of the turrets was disabled. It was therefore decided to arm the new vessels with eight 38 cm guns instead of twelve 30.5 cm guns.

General characteristics

Bayern and Baden were 179.4 metres (588.6 ft) long at the waterline, and an even 180 m (590.6 ft) long overall. Sachsen and Württemberg were slightly longer: 181.8 m (596.5 ft) m at the waterline and 182.4 m (598.4 ft) overall. All four ships had a beam of 30 m (98.4 ft), and had a draft
Draft (hull)
The draft of a ship's hull is the vertical distance between the waterline and the bottom of the hull , with the thickness of the hull included; in the case of not being included the draft outline would be obtained...

 of between 9.3 and 9.4 m (30.5–30.8 ft). Bayern and Baden were designed to displace 28530 t (28,079.3 LT) at a normal displacement; at full combat load, the ships displaced up to 32200 t (31,691.4 LT). Württemberg and Sachsen were slightly heavier, at 28,800 t normal and 32,500 t fully laden. The ships were constructed with transverse and longitudinal steel frames, over which the outer hull plates were rivet
Rivet
A rivet is a permanent mechanical fastener. Before being installed a rivet consists of a smooth cylindrical shaft with a head on one end. The end opposite the head is called the buck-tail. On installation the rivet is placed in a punched or pre-drilled hole, and the tail is upset, or bucked A rivet...

ed. The hull
Hull (watercraft)
A hull is the watertight body of a ship or boat. Above the hull is the superstructure and/or deckhouse, where present. The line where the hull meets the water surface is called the waterline.The structure of the hull varies depending on the vessel type...

 was divided into 17 watertight compartments, and included a double bottom
Double bottom
A double bottom is a ship hull design and construction method where the bottom of the ship has two complete layers of watertight hull surface: one outer layer forming the normal hull of the ship, and a second inner hull which is somewhat higher in the ship, perhaps a few feet, which forms a...

 that ran for 88 percent of the length of the hull.

Bayern and Baden were regarded as exceptional sea boats by the German navy. Bayern and her sisters were stable and very maneuverable. The ships suffered slight speed loss in heavy seas; with the rudder
Rudder
A rudder is a device used to steer a ship, boat, submarine, hovercraft, aircraft or other conveyance that moves through a medium . On an aircraft the rudder is used primarily to counter adverse yaw and p-factor and is not the primary control used to turn the airplane...

s hard over, the ships lost up to 62% speed and heeled over 7 degrees. With a metacentric height
Metacentric height
The metacentric height is a measurement of the static stability of a floating body. It is calculated as the distance between the centre of gravity of a ship and its metacentre . A larger metacentric height implies greater stability against overturning...

 of 2.53 m (8.3 ft), larger than that of their British equivalents, the vessels were stable gun platforms for the confined waters of the North Sea.Metacentric height
Metacentric height
The metacentric height is a measurement of the static stability of a floating body. It is calculated as the distance between the centre of gravity of a ship and its metacentre . A larger metacentric height implies greater stability against overturning...

 (the distance between the center of gravity
Center of gravity
In physics, a center of gravity of a material body is a point that may be used for a summary description of gravitational interactions. In a uniform gravitational field, the center of mass serves as the center of gravity...

—G—and the metacenter—M—abbreviated as GM) determines a ship's tendency to roll in the water; if the GM is too low, the ship will tend to roll severely or even risk capsizing
Capsize
Capsizing is an act of tipping over a boat or ship to disable it. The act of reversing a capsized vessel is called righting.If a capsized vessel has sufficient flotation to prevent sinking, it may recover on its own if the stability is such that it is not stable inverted...

.


The ships of the Bayern class had a standard crew of 42 officers and 1,129 enlisted men; when serving as a squadron flagship, an additional 14 officers and 86 men were required. The vessels carried several smaller craft, including one picket boat, three barges, two launches
Launch (boat)
A launch in contemporary usage refers to a large motorboat. The name originally referred to the largest boat carried by a warship. The etymology of the word is given as Portuguese lancha "barge", from Malay lancha, lancharan, "boat," from lanchar "velocity without effort," "action of gliding...

, two yawl
Yawl
A yawl is a two-masted sailing craft similar to a sloop or cutter but with an additional mast located well aft of the main mast, often right on the transom, specifically aft of the rudder post. A yawl (from Dutch Jol) is a two-masted sailing craft similar to a sloop or cutter but with an...

s, and two dinghies
Dinghy
A dinghy is a type of small boat, often carried or towed for use as a ship's boat by a larger vessel. It is a loanword from either Bengali or Urdu. The term can also refer to small racing yachts or recreational open sailing boats. Utility dinghies are usually rowboats or have an outboard motor,...

.

Machinery

Bayern and Baden were equipped with 11 coal-fired Schulz-Thornycroft boiler
Boiler
A boiler is a closed vessel in which water or other fluid is heated. The heated or vaporized fluid exits the boiler for use in various processes or heating applications.-Materials:...

s and three oil-fired Schulz-Thornycroft boilers in nine boiler rooms. Three sets of Parsons turbines drove three-bladed screws
Propeller
A propeller is a type of fan that transmits power by converting rotational motion into thrust. A pressure difference is produced between the forward and rear surfaces of the airfoil-shaped blade, and a fluid is accelerated behind the blade. Propeller dynamics can be modeled by both Bernoulli's...

 that were 3.87 metres (12.7 ft) in diameter. Bayerns and Badens power plant was designed to run at 35000 shp at 265 revolutions per minute; on trials the ships achieved 55967 shp and 56275 shp, respectively. Both ships were capable of a maximum speed of 22 knots (12 m/s). The first two ships were initially designed to carry 900 t (885.8 LT) of coal and 200 t (196.8 LT) of oil, though fuel bunkerage was subsequently increased to 3400 t (3,346.3 LT) of coal and 620 t (610.2 LT) of oil. This enabled a range of 5000 nautical miles (9,260 km) at a speed of 12 kn (6.5 m/s). At 15 kn (8.2 m/s), the range decreased to 4485 nmi (8,306.2 km), at 17 kn (9.3 m/s) the range fell to 3740 nmi (6,926.5 km), and at 21.5 kn (11.7 m/s) the ships could steam for only 2390 nmi (4,426.3 km). The ships carried eight diesel generators; these supplied each ship with a total of 2,400 kilowatts of electrical power at 220 volt
Volt
The volt is the SI derived unit for electric potential, electric potential difference, and electromotive force. The volt is named in honor of the Italian physicist Alessandro Volta , who invented the voltaic pile, possibly the first chemical battery.- Definition :A single volt is defined as the...

s.

Sachsen and Württemberg were intended to be one knot faster than the earlier pair of ships. Württemberg received more powerful machinery that would have produced 48000 shp for a designed speed of 22 knots. On Sachsen, a MAN diesel engine
Diesel engine
A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber...

 producing 12,000 ihp was installed on the center shaft, while steam turbines powered the outboard shafts. The combined power plant would have produced 42000 shp for a designed speed of 22.5 knots.

Armament

The Bayern class battleships were armed with a main battery of eight 38 cm (15 in) SK L/45 gunsIn Imperial German Navy gun nomenclature, "SK" (Schnellfeuerkanone) denotes that the gun is quick firing, while the L/45 denotes the length of the gun. In this case, the L/45 gun is 45 calibers, meaning that the gun barrel is 45 times as long as it is in bore diameter. See: Grießmer, p. 177 in four Drh LC/1913 twin gun turret
Gun turret
A gun turret is a weapon mount that protects the crew or mechanism of a projectile-firing weapon and at the same time lets the weapon be aimed and fired in many directions.The turret is also a rotating weapon platform...

s. These turrets could train 150 degrees to either side of the centerline, and their guns could depress to −8 degrees. As the Germans thought that conditions in the North Sea would dictate short-range actions, the guns initially could elevate only to 16 degrees, which allowed a maximum range of 20,400 m. The gun mountings were modified to allow elevation up to 20 degrees, increasing the range to 23,200 m.

The main battery was supplied with a total of 720 shells or 90 rounds per gun. The guns had a rate of fire
Rate of fire
Rate of fire is the frequency at which a specific weapon can fire or launch its projectiles. It is usually measured in rounds per minute , or per second .-Overview:...

 of around 2.5 shells per minute. Post-war tests conducted by the British Royal Navy
Royal Navy
The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

 showed that the guns on Baden could be ready to fire again 23 seconds after firing; this was significantly faster than their British contemporaries, the , which took 36 seconds between salvos. The German weapons were, however, less accurate than earlier German weapons, and fired a lighter shell than the equivalent British guns. The German armor-piercing shell weighed 750 kg (1,653 lb) and was driven by a 277 kg (610.7 lb) RPC/12 propellant charge in a brass cartridge. The shells were fired at a muzzle velocity
Muzzle velocity
Muzzle velocity is the speed a projectile has at the moment it leaves the muzzle of the gun. Muzzle velocities range from approximately to in black powder muskets , to more than in modern rifles with high-performance cartridges such as the .220 Swift and .204 Ruger, all the way to for tank guns...

 of 800 mps (2,625 fps). Each gun was expected to fire 300 shells before replacement was required. The guns that had been constructed for the battleships Sachsen and Württemberg were eventually used as coastal guns in occupied France and Belgium; these guns were referred to as Langer Max.

The ships were also armed with a secondary battery of sixteen 15 cm (5.9 in) SK L/45 quick-firing guns, each mounted in MPL C/13 casemate
Casemate
A casemate, sometimes rendered casement, is a fortified gun emplacement or armored structure from which guns are fired. originally a vaulted chamber in a fortress.-Origin of the term:...

s in the side of the top deck. These guns were intended for defense against torpedo boats, and were supplied with a total of 2,240 shells. The guns could engage targets out to 13,500 m, and after improvements in 1915, their range was extended to 16,800 m. The guns had a sustained rate of fire
Rate of fire
Rate of fire is the frequency at which a specific weapon can fire or launch its projectiles. It is usually measured in rounds per minute , or per second .-Overview:...

 of 5 to 7 rounds per minute. The shells were 45.3 kg (99.8 lb), and were loaded with a 13.7 kg (31.2 lb) RPC/12 propellant
Propellant
A propellant is a material that produces pressurized gas that:* can be directed through a nozzle, thereby producing thrust ;...

 charge in a brass cartridge. The guns fired at a muzzle velocity
Muzzle velocity
Muzzle velocity is the speed a projectile has at the moment it leaves the muzzle of the gun. Muzzle velocities range from approximately to in black powder muskets , to more than in modern rifles with high-performance cartridges such as the .220 Swift and .204 Ruger, all the way to for tank guns...

 of 835 meters per second (2,740 ft/s). The guns were expected to fire around 1,400 shells before they needed to be replaced.

Bayern and Baden were also equipped with a pair of 8.8 cm (3.45 in) L/45 flak guns, which were supplied with 800 rounds. The guns were emplaced in MPL C/13 mountings, which allowed depression to −10 degrees and elevation to 70 degrees. These guns fired 9 kg (19.8 lb) shells, and had an effective ceiling of 9,150 m at 70 degrees.

As was customary on capital ships of the period, the Bayern class ships were armed with five 60 cm (24 in) submerged torpedo tubes. One tube was mounted in the bow and two on each broadside. A total of 20 torpedoes were carried per ship. However, both Bayern and Baden struck mines in 1917; the damage incurred revealed structural weaknesses caused by the torpedo tubes; both ships had their lateral tubes removed. The torpedoes were the H8 type, which were 8 metre long and carried a 210 kg (463 lb) Hexanite
Hexanite
Hexanite was a castable German military explosive developed early in the 20th century before the First World War for the Kaiserliche Marine, intended to augment supplies of trinitrotoluene , which were then in short supply. Hexanite is significantly more powerful than TNT on its own...

 warhead. The torpedoes had a range of 6,000 m (6,550 yd) when set at a speed of 36 knots; at a reduced speed of 30 knots, the range increased significantly to 14,000 m (15,310 yd).

Armor

The Bayern class ships were protected with Krupp
Krupp
The Krupp family , a prominent 400-year-old German dynasty from Essen, have become famous for their steel production and for their manufacture of ammunition and armaments. The family business, known as Friedrich Krupp AG Hoesch-Krupp, was the largest company in Europe at the beginning of the 20th...

 cemented steel armor, as was the standard for German warships of the period. They had an armor belt that was 350 mm (13.8 in) thick in the central citadel of the ship, where the most important parts of the ship were located. This included the ammunition magazines and the machinery spaces. The belt was reduced in less critical areas, to 200 mm (7.9 in) forward and 170 mm (6.7 in) aft. The bow
Bow (ship)
The bow is a nautical term that refers to the forward part of the hull of a ship or boat, the point that is most forward when the vessel is underway. Both of the adjectives fore and forward mean towards the bow...

 and stern
Stern
The stern is the rear or aft-most part of a ship or boat, technically defined as the area built up over the sternpost, extending upwards from the counter rail to the taffrail. The stern lies opposite of the bow, the foremost part of a ship. Originally, the term only referred to the aft port section...

 were not protected by armor at all. A 50 mm (2 in)-thick torpedo bulkhead
Torpedo bulkhead
A torpedo bulkhead is a type of armor common on the more heavily armored warships, especially battleships and battlecruisers of the early 20th century. It is designed to keep the ship afloat even if the hull was struck underneath the belt armor by a shell or by a torpedo...

 ran the length of the hull, several meters behind the main belt. The main armored deck was 60 mm (2.4 in) thick in most places, though the thickness of the sections that covered the more important areas of the ship was increased to 100 mm (3.9 in).

The forward conning tower
Conning tower
A conning tower is a raised platform on a ship or submarine, often armored, from which an officer can con the vessel; i.e., give directions to the helmsman. It is usually located as high on the ship as practical, to give the conning team good visibility....

 was protected with heavy armor: the sides were 400 mm (15.7 in) thick and the roof was 170 mm thick. The rear conning tower was less well armored; its sides were only 170 mm thick and the roof was covered with 80 mm (3.1 in) of armor plate. The main battery gun turrets were also heavily armored: the turret sides were 350 mm thick and the roofs were 200 mm thick. The 15 cm guns had 170 mm thick armor plating on the casemates; the guns themselves had 80 mm thick shields to protect their crews from shell splinters.

Construction

The class was planned to include four ships. was built by Howaldtswerke
Howaldtswerke
Howaldtswerke-Deutsche Werft is a German shipbuilding company, headquartered in Kiel. In 2009 it was the largest shipyard in Germany and has more than 2,400 employees. It has been part of ThyssenKrupp Marine Systems owned by ThyssenKrupp, since 2005...

 in Kiel
Kiel
Kiel is the capital and most populous city in the northern German state of Schleswig-Holstein, with a population of 238,049 .Kiel is approximately north of Hamburg. Due to its geographic location in the north of Germany, the southeast of the Jutland peninsula, and the southwestern shore of the...

 under construction number 590; she was laid down in 1913, launched on 18 February 1915, and completed on 15 July 1916. was built by the Schichau
Schichau-Werke
The Schichau-Werke was a German engineering works and shipyard based in Elbing, formerly part of the German Empire, and which is today the town of Elbląg in northern Poland. It also had a subsidiary shipyard in Danzig .-Early years:...

 shipyard in Danzig, under construction number 913. The ship was launched on 30 October 1915 and commissioned into the fleet on 14 March 1917. Sachsen was laid down at the Germaniawerft dockyard in Kiel
Kiel
Kiel is the capital and most populous city in the northern German state of Schleswig-Holstein, with a population of 238,049 .Kiel is approximately north of Hamburg. Due to its geographic location in the north of Germany, the southeast of the Jutland peninsula, and the southwestern shore of the...

, under construction number 210. She was launched on 21 November 1916, but not completed. Sachsen was by then 9 months from completion. Württemberg was built by the AG Vulcan shipyard in Hamburg
Hamburg
-History:The first historic name for the city was, according to Claudius Ptolemy's reports, Treva.But the city takes its modern name, Hamburg, from the first permanent building on the site, a castle whose construction was ordered by the Emperor Charlemagne in AD 808...

, under construction number 19. She was launched on 20 June 1917, but she too was not completed. At the time of cancellation, the ship was approximately 12 months from completion.

Fleet sortie of 18–19 August 1916

During the fleet sortie on 18–19 August 1916, the I Scouting Group, which was the battlecruiser
Battlecruiser
Battlecruisers were large capital ships built in the first half of the 20th century. They were developed in the first decade of the century as the successor to the armoured cruiser, but their evolution was more closely linked to that of the dreadnought battleship...

 reconnaissance force of the High Seas Fleet and commanded by Admiral Franz von Hipper
Franz von Hipper
Franz Ritter von Hipper was an admiral in the German Imperial Navy . Franz von Hipper joined the German Navy in 1881 as an officer cadet. He commanded several torpedo boat units and served as watch officer aboard several warships, as well as Kaiser Wilhelm II's yacht Hohenzollern...

, was to bombard the coastal town of Sunderland in an attempt to draw out and destroy Beatty's battlecruisers. As and were the only two remaining German battlecruisers still in fighting condition after the Battle of Jutland
Battle of Jutland
The Battle of Jutland was a naval battle between the British Royal Navy's Grand Fleet and the Imperial German Navy's High Seas Fleet during the First World War. The battle was fought on 31 May and 1 June 1916 in the North Sea near Jutland, Denmark. It was the largest naval battle and the only...

, three dreadnoughts were assigned to the unit for the operation: Bayern, and the two ships and . Admiral Scheer and the rest of the High Seas Fleet, with 15 dreadnoughts of its own, would trail behind and provide cover. The British were aware of the German plans and sortied the Grand Fleet to meet them. By 14:35, Scheer had been warned of the Grand Fleet's approach and, unwilling to engage the whole of the Grand Fleet just 11 weeks after the decidedly close call at Jutland, turned his forces around and retreated to German ports.

Operation Albion

In early September 1917, following the German conquest of the Russian port of Riga
Riga
Riga is the capital and largest city of Latvia. With 702,891 inhabitants Riga is the largest city of the Baltic states, one of the largest cities in Northern Europe and home to more than one third of Latvia's population. The city is an important seaport and a major industrial, commercial,...

, the German navy decided to evict the Russian naval forces that still held the Gulf of Riga
Gulf of Riga
The Gulf of Riga, or Bay of Riga, is a bay of the Baltic Sea between Latvia and Estonia. According to C.Michael Hogan, a saline stratification layer is found at a depth of approximately seventy metres....

. To this end, the Admiralstab (the Navy High Command) planned an operation to seize the Baltic islands of Ösel
Saaremaa
Saaremaa is the largest island in Estonia, measuring 2,673 km². The main island of Saare County, it is located in the Baltic Sea, south of Hiiumaa island, and belongs to the West Estonian Archipelago...

, particularly the Russian gun batteries on the Sworbe peninsula
Sõrve Peninsula
Sõrve Peninsula is a peninsula which forms the southernmost section of the Estonian island Saaremaa. Its length is 32 km, and its maximum width 10 km...

. On 18 September, the order was issued for a joint Army-Navy operation to capture Ösel and Moon
Muhu
Muhu , is an island in the Baltic Sea. With an area of 198 km² it is the third largest island belonging to Estonia, after Saaremaa and Hiiumaa....

 islands; the primary naval component was to comprise the flagship
Flagship
A flagship is a vessel used by the commanding officer of a group of naval ships, reflecting the custom of its commander, characteristically a flag officer, flying a distinguishing flag...

, the battlecruiser , along with the III Battle Squadron of the High Seas Fleet. The V Division included the four s, and was by this time augmented with Bayern. The VI Division consisted of the five s. Along with nine light cruisers, 3 torpedo boat flotillas, and dozens of mine
Naval mine
A naval mine is a self-contained explosive device placed in water to destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, an enemy vessel...

 warfare ships, the entire force numbered some 300 ships, and were 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-dreadnought
Pre-dreadnought
Pre-dreadnought battleship is the general term for all of the types of sea-going battleships built between the mid-1890s and 1905. Pre-dreadnoughts replaced the ironclad warships of the 1870s and 1880s...

s Slava
Russian battleship Slava
Slava was a pre-dreadnought battleship of the Imperial Russian Navy, the last of the five s. Commissioned too late to participate in the Battle of Tsushima during the Russo-Japanese War, she survived while all of her sister ships were either sunk during the battle or surrendered to the Imperial...

 and Tsarevitch, the armored cruiser
Armored cruiser
The armored cruiser was a type of warship of the late 19th and early 20th centuries. Like other types of cruiser, the armored cruiser was a long-range, independent warship, capable of defeating any ship apart from a battleship, and fast enough to outrun any battleships it encountered.The first...

s Bayan, Admiral Makarov, and Diana, 26 destroyers, and several torpedo boats and gunboats. The garrison on Ösel numbered some 14,000 men.

The operation began on 12 October, when Moltke, Bayern, and the Königs began firing on the Russian shore batteries at Tagga Bay. Simultaneously, the Kaisers engaged the batteries on the Sworbe peninsula; the objective was to secure the channel between Moon and Dagö
Hiiumaa
Hiiumaa is the second largest island belonging to Estonia. It is located in the Baltic Sea, north of the island of Saaremaa, a part of the West Estonian archipelago. Its largest town is Kärdla.-Name:...

 islands, which would block the only escape route of the Russian ships in the gulf. Both Großer Kurfürst and Bayern struck mines while maneuvering into their bombardment positions; damage to the former was minimal, and the ship remained in action. However, Bayern was severely damaged, and temporary repairs proved ineffective. The ship had to be withdrawn to Kiel for repairs; the return trip took 19 days.

Fleet sortie of 23–24 April 1918

In late 1917, the High Seas Fleet began to conduct anti-convoy raids with light craft in the North Sea between Britain and Norway. On 17 October, the German light cruiser
Light cruiser
A light cruiser is a type of small- or medium-sized warship. The term is a shortening of the phrase "light armored cruiser", describing a small ship that carried armor in the same way as an armored cruiser: a protective belt and deck...

s and intercepted a convoy of twelve ships escorted by a pair of destroyers and destroyed it; only three transports managed to escape. On 12 December, four German destroyers intercepted and annihilated another convoy of five ships and two escorting destroyers. This prompted Admiral David Beatty
David Beatty, 1st Earl Beatty
Admiral of the Fleet David Richard Beatty, 1st Earl Beatty, GCB, OM, GCVO, DSO was an admiral in the Royal Navy...

, the Commander in Chief of the Grand Fleet, to detach several battleships and battlecruisers to protect the convoys in the North Sea. This presented to Admiral Scheer the opportunity for which he had been waiting the entire war: the chance to isolate and eliminate a portion of the Grand Fleet.

At 05:00 on 23 April 1918, the entire High Seas Fleet, including Bayern and Baden, left harbor with the intention of intercepting one of the heavily escorted convoys. Wireless radio traffic was kept to a minimum to prevent the British from learning of the operation. However, at 05:10 on 24 April, the battlecruiser Moltke suffered severe mechanical problems and had to be towed back to Wilhelmshaven. By 14:10, the convoy had still not yet been located, and so Scheer turned the High Seas Fleet back towards German waters. In fact, there was no convoy sailing on 24 April; German naval intelligence had miscalculated the sailing date by one day.

Wilhelmshaven mutiny

In October 1918, Admiral Hipper, now the commander of the entire High Seas Fleet, planned for a final battle with the Grand Fleet. Admiral Reinhard Scheer
Reinhard Scheer
Reinhard Scheer was an Admiral in the German Kaiserliche Marine. Scheer joined the navy in 1879 as an officer cadet; he progressed through the ranks, commanding cruisers and battleships, as well as major staff positions on land. At the outbreak of World War I, Scheer was the commander of the II...

, the Chief of the Naval Staff, approved the plan on 27 October; the operation was set for the 30th. However, when the fleet was ordered to assemble in Wilhelmshaven on 29 October, war-weary crews began to desert or openly disobey their orders. Crews aboard , , and demonstrated for peace. The crew aboard was the first to openly mutiny; and joined as well. By the evening of the 29th, red flags of revolution flew from the masts of dozens of warships in the harbor. In spite of this, Hipper decided to hold a last meeting aboard Baden—his flagship—to discuss the operation with the senior officers of the fleet. The following morning, it was clear the mutiny was too far gone to permit a fleet action. In an attempt to suppress the revolt, he ordered one of the battle squadrons to depart for Kiel. By 5 November, red flags had been raised on every battleship in the harbor except König, though it too was commandeered by a sailors' council on 6 November.

Fate

Following the capitulation of Germany in November 1918, the majority of the High Seas Fleet was to be interned in the British naval base in Scapa Flow
Scapa Flow
right|thumb|Scapa Flow viewed from its eastern endScapa Flow is a body of water in the Orkney Islands, Scotland, United Kingdom, sheltered by the islands of Mainland, Graemsay, Burray, South Ronaldsay and Hoy. It is about...

. Bayern was listed as one of the ships to be handed over, though Baden initially was not. The battlecruiser , which the British believed to be completed, was requested instead. When it became apparent to the Allies that Mackensen was still under construction, Baden was ordered to replace it. On 21 November 1918, the ships to be interned, under the command of Rear Admiral Ludwig von Reuter
Ludwig von Reuter
Ludwig von Reuter was a German admiral during World War I, who commanded the Imperial German Navy's High Seas Fleet when it was interned at Scapa Flow at the end of the war. On 21 June 1919 he ordered the scuttling of the fleet to prevent the British from seizing the ships.-Early life:Reuter was...

, sailed from their base in Germany for the last time. The fleet rendezvoused with the light cruiser , before meeting a massive flotilla of some 370 British, American, and French warships for the voyage to Scapa Flow. Baden arrived at Scapa Flow separately on 14 December 1918.

Once the ships were interned, they had their guns disabled through the removal of their breech blocks. The fleet remained in captivity during the negotiations that ultimately produced the Versailles Treaty. It became apparent to Reuter that the British intended to seize the German ships on 21 June, which was the deadline for Germany to have signed the peace treaty.By this time, the Armistice had been extended to 23 June, though there is some contention as to whether von Reuter was aware of this. Admiral Fremantle stated that he informed von Reuter on the evening of the 20th, though von Reuter claims he was unaware of the development. For Fremantle's claim, see Bennett, p. 307. For von Reuter's statement, see Herwig, p. 256 To prevent this, he decided to scuttle his ships at the first opportunity. On the morning of 21 June, the British fleet left Scapa Flow to conduct training maneuvers; at 11:20 Reuter transmitted the order to his ships. Bayern sank at 14:30, but Baden was run aground by British guards; she was the only capital ship that was not sunk. After being refloated and thoroughly examined, Baden was expended as a gunnery target, finally being sunk on 16 August 1921 to the southwest of Portsmouth. Bayern was eventually raised for scrapping on 1 September 1934 and broken up over the following year in Rosyth
Rosyth
Rosyth is a town located on the Firth of Forth, three miles south of the centre of Dunfermline. According to an estimate taken in 2008, the town has a population of 12,790....

.

Both Sachsen and Württemberg were stricken from the German Navy under the terms of Article 186 of the Versailles Treaty. Sachsen was sold for scrapping in 1920 to ship breakers at the Kiel Arsenalmole. Württemberg was sold the following year in 1921, and broken up in Hamburg.
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