The (, ) was the navy of Nazi Germany from 1935 to 1945. It superseded the Imperial German Navy of the German Empire (1871–1918) and the inter-war (1919–1935) of the Weimar Republic. The was one of three official branches, along with the and the , of the , the German armed forces from 1935 to 1945.
In violation of the Treaty of Versailles, the grew rapidly during the German naval rearmament in the 1930s. The 1919 treaty had limited the size of the German navy and prohibited the building of submarines.
ships were deployed to the waters around Spain during the Spanish Civil War (1936–1939) under the guise of enforcing non-intervention, but in reality supporting the Nationalists against the Spanish Republicans.
In January 1939, Plan Z, a massive shipbuilding programme, was ordered, calling for surface naval parity with the British Royal Navy by 1944. When World War II broke out in September 1939, Plan Z was shelved in favour of a crash building programme for submarines (U-boats) instead of capital surface warships, and land and air forces were given priority of strategic resources.
The Commander-in-Chief of the (as for all branches of the armed forces during the period of absolute Nazi power) was Adolf Hitler, who exercised his authority through the ('High Command of the Navy').
Among the 's most significant ships were its U-boats, most of which were constructed after Plan Z was abandoned at the beginning of World War II. Wolfpacks were rapidly assembled groups of submarines which attacked British convoys during the first half of the Battle of the Atlantic, but this tactic was largely abandoned by May 1943, when U-boat losses mounted. Along with the U-boats, surface commerce raiders (including auxiliary cruisers) were used to disrupt Allied shipping in the early years of the war, the most famous of these being the heavy cruisers Admiral Graf Spee and Admiral Scheer and the battleship Bismarck. However, the adoption of convoy escorts, especially in the Atlantic, greatly reduced the effectiveness of surface commerce raiders against convoys.
Following the end of World War II in 1945, the 's remaining ships were divided up among the Allied powers and were used for various purposes including minesweeping. Some were loaded with superfluous chemical weapons and scuttled.Chemical Weapons Dumped in the Ocean After World War II Could Threaten Waters Worldwide smithsonianmag.com November 11, 2016
History Post–World War I origins Under the terms of the 1919 Treaty of Versailles, Germany was only allowed a minimal navy of 15,000 personnel, six capital ships of no more than 10,000 tons, six cruisers, twelve destroyers, twelve torpedo boats, and no submarines or aircraft carriers. Military aircraft were also banned, so Germany could have no naval aviation. Under the treaty Germany could only build new ships to replace old ones. All the ships allowed and personnel were taken over from the Kaiserliche Marine, which was renamed the .
From the outset, Germany worked to circumvent the military restrictions of the Treaty of Versailles. The Germans continued to develop U-boats through a submarine design office in the Netherlands (NV Ingenieurskantoor voor Scheepsbouw) and a torpedo research program in Sweden where the G7e torpedo was developed.Wolves Without Teeth: The German Torpedo Crisis in World War Two p. 24
Even before the Nazi seizure of power on 30 January 1933 the German government decided on 15 November 1932 to launch a prohibited naval re-armament program that included U-boats, airplanes, and an aircraft carrier.
The launching of the first pocket battleship, in 1931 (as a replacement for the old pre-dreadnought battleship ) was a step in the formation of a modern German fleet. The building of the Deutschland caused consternation among the French and the British as they had expected that the restrictions of the Treaty of Versailles would limit the replacement of the pre-dreadnought battleships to coastal defence ships, suitable only for defensive warfare. By using innovative construction techniques, the Germans had built a heavy ship suitable for offensive warfare on the high seas while still abiding by the letter of the treaty.
Nazi control
When the Nazis came to power in 1933, Hitler soon began to more brazenly ignore many of the Treaty restrictions and accelerated German naval rearmament. The Anglo-German Naval Agreement of 18 June 1935 allowed Germany to build a navy equivalent to 35% of the British surface ship tonnage and 45% of British submarine tonnage; battleships were to be limited to 35,000 tons. That same year the Reichsmarine was renamed as the Kriegsmarine. In April 1939, as tensions escalated between the United Kingdom and Germany over Poland, Hitler unilaterally rescinded the restrictions of the Anglo-German Naval Agreement.
The building-up of the German fleet in the time period of 1935–1939 was slowed by problems with marshaling enough manpower and material for ship building. This was because of the simultaneous and rapid build-up of the German Army and Air Force which demanded substantial effort and resources. Some projects, like the D-class cruisers and the P-class cruisers, had to be cancelled.
Spanish Civil War
The first military action of the Kriegsmarine came during the Spanish Civil War (1936–1939). Following the outbreak of hostilities in July 1936 several large warships of the German fleet were sent to the region. The heavy cruisers Deutschland and , and the light cruiser were the first to be sent in July 1936. These large ships were accompanied by the 2nd Torpedo-boat Flotilla. The German presence was used to covertly support Francisco Franco's Nationalists although the immediate involvement of the Deutschland was humanitarian relief operations and evacuating 9,300 refugees, including 4,550 German citizens. Following the brokering of the International Non-Intervention Patrol to enforce an international arms embargo, the Kriegsmarine was allotted the patrol area between Cabo de Gata (Almeria) and Cabo de Oropesa. Numerous vessels served as part of these duties including . On 29 May 1937 the Deutschland was attacked off Ibiza by two bombers from the Republican Air Force. Total casualties from the Republican attack were 31 dead and 110 wounded, 71 seriously, mostly burn victims. In retaliation the Admiral Scheer shelled Almeria on 31 May killing 19–20 civilians, wounding 50 and destroying 35 buildings.Thomas, Hugh. The Spanish Civil War. Penguin Books. London. 2006. p. 665 Following further attacks by Republican submarines against the off the port of Oran between 15 and 18 June 1937 Germany withdrew from the Non-Intervention Patrol.
U-boats also participated in covert action against Republican shipping as part of Operation Ursula. At least eight U-boats engaged a small number of targets in the area throughout the conflict. (By comparison the Italian Regia Marina operated 58 submarines in the area as part of the Sottomarini Legionari.)
Plan Z
The Kriegsmarine saw as her main tasks the controlling of the Baltic Sea and winning a war against France in connection with the German army, because France was seen as the most likely enemy in the event of war. But in 1938 Hitler wanted to have the possibility of winning a war against Great Britain at sea in the coming years. Therefore, he ordered plans for such a fleet from the Kriegsmarine. From the three proposed plans (X, Y and Z) he approved Plan Z in January 1939. This blueprint for the new German naval construction program envisaged building a navy of approximately 800 ships during the period 1939–1947. Hitler demanded that the program be completed by 1945. The main force of Plan Z were six H-class battleships. In the version of Plan Z drawn up in August 1939, the German fleet was planned to consist of the following ships by 1945: 4 aircraft carriers 10 battleships 15 armored ships (Panzerschiffe) 3 battlecruisers 5 heavy cruisers 44 light cruisers 158 destroyers and torpedo boats 249 submarines Numerous smaller craft Personnel strength was planned to rise to over 200,000.
The planned naval program was not very far advanced by the time World War II began. In 1939 two s and two H-class battleships were laid down and parts for two further H-class battleships and three s were in production. The strength of the German fleet at the beginning of the war was not even 20% of Plan Z. On 1 September 1939, the navy still had a total personnel strength of only 78,000, and it was not at all ready for a major role in the war. Because of the long time it would take to get the Plan Z fleet ready for action and shortage in workers and material in wartime, Plan Z was essentially shelved in September 1939 and the resources allocated for its realisation were largely redirected to the construction of U-boats, which would be ready for war against the United Kingdom more quickly.Siegfried Breyer: Der Z-PLAN. Podzun-Pallas-Verlag. Wölfersheim-Berstadt 1996.
World War II
The Kriegsmarine took part in the Battle of Westerplatte and the Battle of the Danzig Bay during the invasion of Poland. In 1939, major events for the Kriegsmarine were the sinking of the British aircraft carrier and the British battleship and the loss of at the Battle of the River Plate. Submarine attacks on Britain's vital maritime supply routes (Battle of the Atlantic) started immediately at the outbreak of war, although they were hampered by the lack of well placed ports from which to operate. Throughout the war the Kriegsmarine was responsible for coastal artillery protecting major ports and important coastal areas. It also operated anti-aircraft batteries protecting major ports.
In April 1940, the German Navy was heavily involved in the invasion of Norway, where it suffered significant losses, which included the heavy cruiser sunk by artillery and torpedoes from Norwegian shore batteries at the Oscarsborg Fortress in the Oslofjord. Ten destroyers were lost in the Battles of Narvik (half of German destroyer strength at the time), and two light cruisers, the Königsberg which was bombed and sunk by Royal Navy aircraft in Bergen, and the Karlsruhe which was sunk off the coast of Kristiansand by a British submarine. The Kriegsmarine did in return sink some British warships during this campaign, including the aircraft carrier .
The losses in the Norwegian Campaign left only a handful of undamaged heavy ships available for the planned, but never executed, invasion of the United Kingdom (Operation Sea Lion) in the summer of 1940. There were serious doubts that the invasion sea routes could have been protected against British naval interference. The Fall of France and the conquest of Norway gave German submarines greatly improved access to British shipping routes in the Atlantic. At first, British convoys lacked escorts that were adequate either in numbers or equipment and, as a result, the submarines had much success for few losses (this period was dubbed the First Happy Time by the Germans).
Italy entered the war in June 1940, and the Battle of the Mediterranean began: from September 1941 to May 1944 some 62 German submarines were transferred there, sneaking past the British naval base at Gibraltar. The Mediterranean submarines sank 24 major Allied warships (including 12 destroyers, 4 cruisers, 2 aircraft carriers, and 1 battleship) and 94 merchant ships (449,206 tons of shipping). None of the Mediterranean submarines made it back to their home bases, as they were all either sunk in battle or scuttled by their crews at the end of the war.Uboat.net, U-boats in the Mediterranean – Overview
In 1941, one of the four modern German battleships, sank while breaking out into the Atlantic for commerce raiding. The Bismarck was in turn hunted down by much superior British forces after being crippled by an air-launched torpedo. She was subsequently scuttled after being rendered a burning wreck by two British battleships.