Question: What is the code name for a German assault during WWII that was the invasion of Denmark and Norway in April 1940?

full_context: Document 1: Operation Weserübung: Operation "Weserübung" (] ) was the code name for Germany's assault on Denmark and Norway during the Second World War and the opening operation of the Norwegian Campaign. The name comes from the German for Operation Weser-Exercise ("Unternehmen Weserübung"), the Weser being a German river.
Document 2: Luftwaffe Order of Battle August 1940: For its Battle of Britain campaign against Great Britain during World War II, the German Luftwaffe had the following Order of Battle in the West. "Luftflotte 2" was responsible for the bombing of southeast England and the London area and based in the Pas-de-Calais area in France. "Luftflotte 3" targeted the West Country, Midlands, and northwest England, from bases a bit further north in France. "Luftflotte 5" targeted the north of England and Scotland, from bases in Norway. "Luftflotte 1" and "Luftflotte 4" were based in Germany, but most of their bomber formations had been reassigned to the three "Luftflotten" engaged in the Battle of Britain. Some fighters were retained to provide air cover over Germany, however.
Document 3: Operation Overlord: Operation Overlord was the codename for the Battle of Normandy, the Allied operation that launched the successful invasion of German-occupied Western Europe during World War II. The operation was launched on 6 June 1944 with the Normandy landings (Operation Neptune, commonly known as D-Day). A 1,200-plane airborne assault preceded an amphibious assault involving more than 5,000 vessels. Nearly 160,000 troops crossed the English Channel on 6 June, and more than two million Allied troops were in France by the end of August.
Document 4: OPROP!: OPROP! ("Opraab!" in correct 1940-Danish; proclamation) was a German leaflet dropped over several Danish cities at the German invasion of Denmark on April 9, 1940. The leaflets were signed by the head of Operation Weserübung Süd, General Leonhard Kaupisch. The text, written in very broken but understandable Danish mixed with Norwegian, justified the German invasion as fraternally protecting Danish and Norwegian neutrality against British aggression, denounced Winston Churchill as a warmongerer, and exhorted the Danish populace not to resist the German presence while an arrangement with the Danish government was being negotiated.
Document 5: German occupation of Norway: The German occupation of Norway began on 9 April 1940 after German forces invaded the neutral Scandinavian country of Norway. Conventional armed resistance to the German invasion ended on 10 June 1940 and the Germans then controlled Norway until the capitulation of German forces in Europe on May 8/9, 1945. Throughout this period, Norway was continuously occupied by the "Wehrmacht". Civil rule was effectively assumed by the "Reichskommissariat Norwegen" (Reich Commissariat of Norway), which acted in collaboration with a pro-German puppet government, while the Norwegian King and prewar government escaped to London, where they acted as a government in exile. This period of military occupation is in Norway referred to as the "war years" or "occupation period".
Document 6: Operation Jupiter (Norway): Operation Jupiter was the code name for a plan originating in 1941 for an invasion of northern Norway and Finland by Allied forces during the Second World War. The first versions of the plan were code named Operation Dynamite, Operation Ajax and Operation Marrow. Devised and vigorously promoted by Sir Winston Churchill, the Prime Minister of the United Kingdom, the plan was opposed by all the senior British and Allied commanders, who considered it impractical because of insufficient air support and of limited value. The scheme was eventually abandoned in favour of the Normandy landings.
Document 7: Defence Medal 1940–1945: The Defence Medal 1940–1945 (Norwegian: Deltagermedaljen 9. april 1940 - 8. mai 1945/Deltakarmedaljen 9. april 1940 - 8. mai 1945 ) is the award rewarded to those military and civilian personnel who participated in the fight against the German invasion and occupation of Norway between 1940 and 1945.
Document 8: Norwegian Campaign order of battle: 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.
Document 9: Western Allied invasion of Germany: The Western Allied invasion of Germany was coordinated by the Western Allies during the final months of hostilities in the European theatre of World War II. The Allied invasion of Germany started with the Western Allies crossing the Rhine River in March 1945 before fanning out and overrunning all of western Germany from the Baltic in the north to Austria in the south before the Germans surrendered on 8 May 1945. This is known as the "Central Europe Campaign" in United States military histories.
Document 10: German U-boat bases in occupied Norway: German U-boat bases in occupied Norway operated between 1940 and 1945, when the "Kriegsmarine" (German navy), converted several naval bases in Norway into submarine bases. Norwegian coastal cities became available to the "Kriegsmarine" after the invasion of Denmark and Norway in April 1940. Following the conclusion of the Norwegian Campaign (June 1940), the occupying Germans began to transfer U-boats stationed in Germany to many Norwegian port cities such as Bergen, Narvik, Trondheim, Hammerfest and Kirkenes. Initial planning for many U-boat bunkers began in late 1940. Starting in 1941, the Todt Organisation began the construction of bunkers in Bergen and Trondheim. These bunkers were completed by Weyss & Freytagg AG between 1942 and 1943.
Document 11: Friedrich Bonte: Friedrich Bonte (19 October 1896 – 10 April 1940) was the German naval officer commanding the destroyer flotilla that transported invasion troops to Narvik during the German invasion of Norway (Operation Weserübung) in April 1940.
Document 12: Alfred Keller: In September 1939, when the Second World War begun, the then General Alfred Keller commanded the 4th Air Corps during the invasion of Poland, assuming this command on 13 October 1939. The following campaigns, during campaigns against Norway, the Netherlands, Belgium and the Battle of France, he commanded Luftflotte 2 with General Albert Kesselring as his superior.
Document 13: Operation Donnerkeil: Unternehmen Donnerkeil (Operation Thunderbolt) was the codename for a German military operation of the Second World War. "Donnerkeil" was designed as an air superiority operation to support the "Kriegsmarine's " (German Navy) Operation Cerberus, also known as the Channel Dash.
Document 14: Elvegårdsmoen: Elvegårdsmoen is a military training camp site in the municipality of Narvik in Nordland county, Norway. It is located in the inner end of Herjangsfjorden, on the southeast side of the village of Bjerkvik. The site was of some importance during the German invasion of Norway in April 1940 and the subsequent Norwegian Campaign. The camp was occupied by German forces on 9 April 1940, and it was recaptured by soldiers from the French Foreign Legion during the Battles of Narvik on 13 May 1940.
Document 15: Normandy landings: The Normandy landings (codenamed Operation Neptune) were the landing operations on Tuesday, 6 June 1944 (termed D-Day) of the Allied invasion of Normandy in Operation Overlord during World War II. The largest seaborne invasion in history, the operation began the liberation of German-occupied northwestern Europe from Nazi control, and contributed to the Allied victory on the Western Front.
ground_truth: Weserübung