The Royal Norwegian Navy is the branch of the Norwegian Armed Forces responsible for naval operations of Norway, including those of the Norwegian Coast Guard. As of 2008, the Royal Norwegian Navy consists of approximately 3,700 personnel and 70 vessels, including 4 heavy frigates, 6 submarines, 14 patrol boats, 4 minesweepers, 4 minehunters, 1 mine detection vessel, 4 support vessels and 2 training vessels.
Drøbak is a town and the centre of the municipality of Frogn, in Akershus county, Norway. The city is located along the Oslofjord, and has 13,409 inhabitants.
The Oslofjord is an inlet in southeastern Norway. The 120-kilometre (75 mi) fjord begins at the small village of Bonn in Frogn Municipality and stretching northwards to the city of Oslo, and then curving to the east and then south again. It then flows south to an imaginary line running between the Torbjørnskjær Lighthouse and Færder Lighthouse where it becomes part of the Skagerrak strait. The Skagerrak connects the North Sea and the Kattegat sea area, which leads to the Baltic Sea. The Oslofjord is not a fjord in the geological sense, but in the Norwegian language, the term fjord can refer to a wide range of waterways including inlets such as this one.
Deutschland was the lead ship of her class of heavy cruisers which served with the Kriegsmarine of Nazi Germany during World War II. Ordered by the Weimar government for the Reichsmarine, she was laid down at the Deutsche Werke shipyard in Kiel in February 1929 and completed by April 1933. Originally classified as an armored ship by the Reichsmarine, in February 1940 the Germans reclassified the remaining two ships of this class as heavy cruisers. In 1940, she was renamed Lützow, after the unfinished Admiral Hipper-class heavy cruiser Lützow was sold to the Soviet Union the previous year.
The German operation for the invasion of Denmark and Norway in April 1940 was code-named Weserübung, or "Weser Exercise." Opposing the invasion were the partially mobilized Norwegian military, and an allied expeditionary force composed of British, French, and Free Polish formations. The following list formed the order of battle for this campaign.
Oscarsborg Fortress is a coastal fortress in the Oslofjord, close to the town of Drøbak in Akershus County, Norway. The best known part is situated on two small islets: Nordre Kaholmen and Søndre Kaholmen. In addition, the main artillery batteries were on the island Håøya and smaller batteries were on the mainland to the west and east of the fjord. The fortress is best known for sinking the German heavy cruiser Blücher on 9 April 1940. The fortress was military territory until 2003 when it was made into a publicly available museum and resort. In 2014, Oscarsborg Fortress was given protected status.
Pol III was a patrol boat of the Royal Norwegian Navy, used for guarding the inlet of the Oslofjord in early April 1940. She was a small vessel, originally a whaler, of 214 tons. She is best known for being the first Norwegian unit to engage the German invasion forces during the 1940 Operation Weserübung.
Leif Welding-Olsen was the commander of the Royal Norwegian Navy patrol boat HNoMS Pol III. He was the first Norwegian to be killed during the German invasion of Norway. On 8 April 1940, Leif Welding-Olsen raised the alarm as the German navy ships moved past the guard lines in outer Oslofjord. Norway had been attacked at 22:05 hrs that evening as German ships passed the Norwegian territorial borders. Captain Welding-Olsen had a brief conversation with the commander of one of the German torpedo boats, who demanded that he surrender, but Welding-Olsen refused. Realizing that the enemy would not turn away, and was going to violate Norwegian neutrality, Pol III fired flares to alert Norwegian coastal batteries and rammed the Albatros.
The Battle of Drøbak Sound took place in Drøbak Sound, the northernmost part of the outer Oslofjord in southern Norway, on 9 April 1940. It marked the end of the "Phoney War" and the beginning of World War II in Western Europe.
HNoMS Olav Tryggvason was a minelayer that was built by the naval shipyard at Horten in the early 1930s with the yard number 119. She served in the Royal Norwegian Navy until captured by the Germans in 1940. The Germans renamed her first Albatros II, and a few days later Brummer. She was wrecked in a British bombing raid in northern Germany in April 1945.
Kvarven Fort was a mountain fort strategically located by the main shipping channel of the Byfjorden leading to Bergen, Norway.
Birger Kristian Eriksen was a Norwegian military officer who was instrumental in stopping the first wave of Gruppe 5 of the German invasion force outside Oslo.
HNoMS Sæl was the penultimate vessel of the ten 1. class torpedo boats of the Royal Norwegian Navy. She was built at the Royal Norwegian Navy Shipyard in Horten in 1901, with yard number 85. She was to see close to 40 years service with the Royal Norwegian Navy, taking part in the preparations for war in connection with the dissolution the union with Sweden in 1905, enforcing Norwegian neutrality during the First World War and opposing the German invasion of Norway in 1940. She was lost in battle with Kriegsmarine vessels at Ånuglo in the Hardangerfjord on 18 April 1940.
Blücher was the second of five Admiral Hipper-class heavy cruisers of Nazi Germany's Kriegsmarine, built after the rise of the Nazi Party and the repudiation of the Treaty of Versailles. Named for Gebhard Leberecht von Blücher, the Prussian victor of the Battle of Waterloo, the ship was laid down in August 1936 and launched in June 1937. She was completed in September 1939, shortly after the outbreak of World War II. After completing a series of sea trials and training exercises, the ship was pronounced ready for service with the fleet on 5 April 1940. She was armed with a main battery of eight 20.3 cm (8 in) guns and, although nominally under the 10,000-long-ton (10,160 t) limit set by the Anglo-German Naval Agreement, actually displaced over 16,000 long tons (16,260 t).
The Drøbak Sound is a sound at the Oslofjord narrows between Drøbak and Hurum. "Outer Oslofjord" is a term for the fjord south of the Drøbak Sound until it meets the Skagerrak. "Inner Oslofjord" is a term for the rest of the fjord, starting at the Drøbak Sound and extending northwards towards Oslo, where the fjord turns southwards and continues as the Bunne Fjord.
The Battle of Horten Harbour or the Action at Horten was an engagement that occurred on 9 April 1940. It took place during Operation Weserübung, when the Germans launched an amphibious assault on Karljohansvern, the Norwegian naval base at Horten. After being initially repulsed by Norwegian naval units, German troops headed overland to outflank the base, forcing it to capitulate.
Albatros was the fourth of six Type 23 torpedo boats built for the German Navy. Completed in 1927, Albatros often served as a flagship of torpedo boat units. The ship made multiple non-intervention patrols during the Spanish Civil War in the late 1930s. After an attack by aircraft of the Spanish Republican Air Force killed German sailors in 1937, she participated in the retaliatory bombardment of Almería.
The 28 cm MRK L/35 was a German naval gun that was used in World War I as the primary armament of the Brandenburg-class pre-dreadnought battleships. It also saw use as a Coastal-defense gun during World War II.
Kondor was the fifth of six Type 23 torpedo boats built for the German Navy. The boat made multiple non-intervention patrols during the Spanish Civil War in the late 1930s. During World War II, she played a minor role in the attack on Oslo, the capital of Norway, during the Norwegian Campaign of 1940. Kondor spent the next several months escorting minelayers as they laid minefields and damaged heavy ships back to Germany before she was transferred to France around September. She started laying minefields herself that month and continued to do so for the rest of the war. The boat returned to France in 1942 and helped to escort blockade runners, commerce raiders and submarines through the English Channel and the Bay of Biscay. Damaged by a mine shortly before the Allied Invasion of Normandy in June 1944, Kondor was under repair on the day of the landings. Recognizing that she could not be repaired quickly, the boat was decommissioned later that month and was then further damaged by British bombers so that she was declared a constructive total loss.
Möwe was the lead ship of her class of six torpedo boats built for the German Navy. The boat made multiple non-intervention patrols during the Spanish Civil War in the late 1930s. During the Norwegian Campaign of 1940, she played a minor role in the attack on Oslo, the capital of Norway. Möwe was torpedoed and badly damaged by a British submarine in May and did not return to active service until 1942 when she was transferred to France. The boat helped to escort blockade runners, commerce raiders and submarines through the Bay of Biscay. She also laid numerous minefields and attacked Allied ships during the Invasion of Normandy in June 1944. Möwe was sunk by British bombers that same month.
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