Question: Which branch of the Norwegian Armed Forces had the first multi-vessel class of destroyers known as the "Draug" built for them?

Context paragraphs:
Charles F. Adams-class destroyer: The "Charles F. Adams" class is a ship class of 29 guided missile destroyers built between 1958 and 1967.  Twenty three destroyers were built for the United States Navy, three for the Royal Australian Navy, and three for the West German "Bundesmarine".  The design of these ships was based on that of "Forrest Sherman"-class destroyer s, but the "Charles F. Adams" class were the first class designed to serve as guided missile destroyers.  19 ft of length was added to the center of the design of the "Forrest Sherman" class to carry the ASROC launcher.  The "Charles F. Adams"-class destroyers were the last steam turbine-powered destroyers built for the U.S. Navy.  Starting with the later "Spruance"-class destroyer s, all U.S. Navy destroyers have been powered by gas turbines.  Some of the destroyers of the "Charles F. Adams" class served during the blockade of Cuba in 1962 and during the Vietnam War.

Royal Norwegian Navy: The Royal Norwegian Navy (Norwegian: Sjøforsvaret, "the naval defence (forces)") is the branch of the Norwegian Armed Forces responsible for naval operations of the state of Norway.  s of 2008 , the RNoN consists of approximately 3,700 personnel (9,450 in mobilized state, 32,000 when fully mobilized) and 70 vessels, including 5 heavy frigates, 6 submarines, 14 patrol boats, 4 minesweepers, 4 minehunters, 1 mine detection vessel, 4 support vessels and 2 training vessels.  The navy also includes the Coast Guard.

Army Medical Service (Norway): The Army Medical Service ("Hærens sanitet") was a branch of the Norwegian Armed Forces.  Dating back to the 19th century, it was dissolved in 2002 when all medical services became part of the Norwegian Armed Forces Medical Services ("Forsvarets sanitet").

Norwegian Armed Forces Shooting Committee: The Norwegian Armed Forces Shooting Committee, "Norwegian:" Forsvarets Skyteutvalg (FSU) is a part of the Norwegian Armed Forces that give soldiers and former soldiers opportunity to compete in shooting sports.  FSU also assists with marksmanship education and instruction for the Norwegian Armed Forces.

Norwegian Armed Forces: The Norwegian Armed Forces (Norwegian: "Forsvaret" , "The Defence") is the military organisation responsible for the defence of Norway.  It consists of four branches, the Norwegian Army, the Royal Norwegian Navy, which includes the Coast Guard, the Royal Norwegian Air Force, and the Home Guard, as well as several joint departments.  The armed forces number 25,500 personnel, including civilian employees, and have a full-mobilisation combat strength of 83,000.

Free Norwegian forces: The Norwegian armed forces in exile (Norwegian: "Utefronten" , "Forces Abroad") were remnants of the armed forces of Norway that continued to fight the Axis powers from Allied countries, such as Britain and Canada, after they had escaped the German conquest of Norway during World War II.

Staff Band of the Norwegian Armed Forces: The Staff Band of the Norwegian Armed Forces (Norwegian: "Forsvarets stabsmusikkorps, FSMK" ) is the foremost of the military bands of the Norwegian Armed Forces and Norway's largest professional wind band, employing 39 full-time musicians.  The band is based in Oslo and participates in parades and ceremonies for Norwegian royalty, the government and the armed forces, and tours throughout Norway and abroad.  In addition, the band has an extensive concert schedule in the Oslo area.

Armed Forces Museum (Norway): The Armed Forces Museum of Norway (Norwegian: "Forsvarsmuseet - The Defence Museum") is located at Akershus Castle (Building 62) in Oslo, Norway.  The museum has free admission.  Previously it was named Hærmuseet, "The Army Museum" (even earlier the Artillery Museum), therefore, the museum consists of mostly army materiel.  The Armed Forces Museum is the main museum sorting under the Norwegian Armed Forces Museum superstructure.

Draug-class destroyer: The "Draug" class was the first multi-vessel class of destroyers built for the Royal Norwegian Navy (RNoN), the first destroyer to be built for the RNoN being "Valkyrjen" , commissioned 17 May 1896.

Royal Norwegian Air Force Academy: The Royal Norwegian Air Force Academy (RNoAFA) is the Norwegian Air Force’s college which conducts officer training for the RNoAF and the Norwegian Armed Forces.  The school was established in 1949 and is one of the Armed Forces´ three military academies.  The two others are the Army Academy and the Naval Academy.  The students at the Armed Forces´ Academies are referred to as cadets and have full salary during education.  The cadets at the RNoAFA have their own association, the Cadet Society (Kadettsamfunnet).  The RNoAFA has a staff of 40 and a student body of 80 cadets and has since 1961 been located in Trondheim.  The Commandant of the Royal Norwegian Air Force Academy is (from Autumn 2009) Colonel Ole Asbjørn Fauske.

Supporting paragraphs: Draug-class destroyer Royal Norwegian Navy
Answer: Royal Norwegian Navy