Екінші дүниежүзілік соғыстағы Норвегия кампаниясы

Second World War campaign fought in Norway
the World War II campaign

The Norwegian campaign (8 April 10 June 1940) involved the attempt by Allied forces to defend northern Norway coupled with the resistance of the Norwegian military to the country's invasion by Nazi Germany in World War II. Planned as Operation Wilfred and Plan R 4, while the German attack was feared but had not yet happened, the battlecruiser set out from Scapa Flow for the Vestfjorden with twelve destroyers on 4 April. The Royal Navy and the Kriegsmarine met at the first and second naval battles of Narvik on 10 and 13 April, and British forces conducted the Åndalsnes landings on 13 April. The main strategic reason for Germany to invade Norway was to seize the port of Narvik and guarantee the delivery of iron ore needed for German steel production. During this time both sides wished to open secondary fronts. For the Allies, in particular the French, this was based on a desire to avoid repeating the trench warfare of the First World War, which had occurred on the Franco German border. Almost immediately after the outbreak of war, the British began pressuring the Norwegian government to provide them with the services of the Norwegian merchant navy, being in dire need of shipping to oppose the strength of Nazi forces. Following protracted negotiations between 25 September and 20 November 1939, the Norwegians agreed to charter 150 tankers, as well as other ships with a tonnage of 450,000 gross tons. The Norwegian government's concern for the country's supply lines played an important role in persuading them to accept the agreement.

Norway, although neutral, was considered strategically important for both sides for several reasons. First was the importance of iron ore from Sweden – upon which Germany depended – exported through the Norwegian port of Narvik. This route was especially important in the winter months when much of the Baltic Sea was frozen over. Narvik became of greater significance to the British when it became apparent that Operation Catherine, a plan to gain control of the Baltic Sea, would not be realized. Großadmiral Erich Raeder had pointed out several times in 1939 the danger to Germany of Britain seizing the initiative and launching its own invasion in Scandinavia, for if the powerful Royal Navy had bases at Bergen, Narvik and Trondheim, the North Sea would be virtually closed to Germany, and the Kriegsmarine would be at risk even in the Baltic. Controlling Norway would also be a strategic asset in the Battle of the Atlantic. The capture of ports would create gaps in the blockade of Germany, giving access to the Atlantic Ocean. These ports would allow Germany to use its sea power effectively against the Allies. Control of Norwegian air bases would allow German reconnaissance aircraft to operate far into the North Atlantic, while German U boats and surface ships operating out of Norwegian naval bases would be able to break the British blockade line across the North Sea and attack convoys heading to Great Britain.

When the Soviet Union launched its attack against Finland on 30 November 1939, the Allies found themselves aligned with Norway and Sweden in support of Finland against the much larger aggressor. After the outbreak of the Winter War between Finland and the Soviet Union, Norway mobilized larger land forces than what had initially been considered necessary. By early 1940 their 6th Division in Finnmark and Troms fielded 9,500 troops to defend against a potential Soviet attack, positioned mostly in the eastern regions of Finnmark. Parts of the 6th Division's forces remained in Finnmark even after the German invasion, guarding against the danger. During the Winter War, the Norwegian authorities secretly broke the country's own neutrality by sending the Finns a shipment of 12 Ehrhardt 7.5 cm Model 1901 artillery pieces and 12,000 shells, as well as allowing the British to use Norwegian territory to transfer aircraft and other weaponry to Finland. The plan, promoted by the British General Edmund Ironside, included two divisions landing at Narvik, five battalions somewhere in mid Norway, and another two divisions at Trondheim. The French government pushed for action to be taken to confront the Germans away from France. These developments concerned the Germans. The Molotov–Ribbentrop Pact had placed Finland within the Soviet sphere of interest, and the Germans therefore claimed neutrality in the conflict. This policy caused a rise in anti German sentiment throughout Scandinavia, since it was commonly believed that the Germans were allied with the Soviets. Fears began to crop up in the German high command that Norway and Sweden would then allow Allied troops to transit their territory to go to Finland's aid. The proposed Allied deployments never occurred, after protests from both Norway and Sweden, when the issue of transfers of troops through their territory was suggested. With the Moscow Peace Treaty on 12 March 1940, the Finland related Allied plans were dropped. The abandonment of the planned landings put immense French pressure on Neville Chamberlain's British government, and eventually led to the Allies laying mines off the Norwegian coast on 8 April.]] The German high command originally thought that having Norway remain neutral was in its interest. As long as the Allies did not enter Norwegian waters, there would be safe passage for merchant vessels transporting ore via Norwegian coastal waters to Germany. Großadmiral Erich Raeder, however, argued for an invasion. He believed that the Norwegian ports would be of crucial importance for Germany in a war with the United Kingdom. After the first meeting with Quisling, Hitler ordered the Oberkommando der Wehrmacht (OKW) to begin investigating possible invasion plans of Norway. The first comprehensive German plan for the occupation of Norway, Studie Nord, ordered by Hitler on 14 December, was completed by 10 January 1940. On 27 January, Hitler ordered that a new plan, named Weserübung, be developed. Work on Weserübung began on 5 February.

The German forces used in the campaign were some 120,000 troops in seven divisions and one Fallschirmjäger battalion, as well as panzer and artillery units. Most of the Kriegsmarine's major units were also earmarked for the campaign. The Luftwaffe's 10th Air Corps deployed against Norway consisted of 1,000 aircraft, including 500 transport planes and 186 Heinkel He 111 bombers.

The Norwegian Armed Forces fielded around 55,000 combatants involved in the fighting, including 19,000 soldiers, mainly in six infantry divisions. The Norwegian Army had around 60,000 trained soldiers, with 3,750 troops per regiment. However, by the Germans' speed and surprise, only 52,000 ever saw combat. The Allied expeditionary force numbered around 38,000 men.

The German invasion began on 3 April 1940, when covert supply vessels began to head out in advance of the main force. Discovered amongst the wreckage were uniformed German soldiers and military supplies. Though Orzeł reported the incident to the Admiralty, they were too concerned by the situation with Glowworm and the presumed German breakout to give it much thought and did not pass the information on. Many of the German soldiers from the wreck were rescued by Norwegian fishing boats and the destroyer On interrogation the survivors disclosed that they were assigned to protect Bergen from the Allies. This information was passed on to Oslo, where the Norwegian Parliament ignored the sinking due to being distracted by the British mining operations off the Norwegian coast. At about this time, further north, Renown was heading back to Vestfjord after reaching Glowworms last known location and not finding anything. Heavy seas had caused Whitworth to sail further north than normal, and he was separated from his destroyers when he encountered Scharnhorst and Gneisenau. Renown engaged the two battlecruisers off the Lofoten Archipelago, and during the short battle Renown scored several hits on the German vessels, forcing them to flee north. Renown attempted to pursue, but the German warships used their superior speed to escape. Gruppe 5 encountered the most serious resistance at the inner defensive fortifications of the Oslofjord, in the vicinity of Drøbak. German cruiser Blücher, leading the group, approached the forts assuming that they would be taken by surprise and not respond in time, as had been the case with those in the outer fjord. It was not until the cruiser was at point blank range that Oscarsborg Fortress opened fire, hitting with every shell. Within a matter of minutes, Blücher was crippled and burning heavily. The damaged cruiser was sunk by a salvo of antiquated, 40 year old torpedoes launched from land based torpedo tubes. She carried much of the administrative personnel intended both for the occupation of Norway and also for the headquarters of the army division assigned to seize Oslo. The cruiser German cruiser Lützow, also damaged in the attack and believing Blücher had entered a minefield, withdrew with Gruppe 5, 19 km (12 mi) south to Sonsbukten where she unloaded her troops. This distance delayed the arrival of the main German invasion force for Oslo by over 24 hours, though the Norwegian capital would still be captured less than 12 hours after the loss of Blücher by troops flown into Fornebu Airport near the city. Norwegian attempts to mount a counter attack were half hearted and effectively came to nothing. On learning of this, Oslo was declared an open city and soon fully surrendered. For Gruppe 6 at Egersund and the paratroops at Stavanger, there was no significant opposition and they quickly captured their objectives.

This battle, although very small, had saved the Norwegian royal family. As the invasion had begun, the Norwegian Government fled to nearby Hamar. Among them, a group of Norwegian Royal Guardsmen and some soldiers, possibly from the 5th Regiment in nearby Elverum took positions in Midtskogen to try to stop or slow down the Germans so that the Norwegian royal family could evacuate. In the morning of 10 April, a firefight ended with the retreat of both sides as Captain Spiller, the leader of the German Fallschirmjager, had been hit. Casualties are estimated to five Germans killed and an unknown number wounded, and three Norwegians hit.

The German plans for the invasion and occupation of Norway relied heavily on air power. In order to secure the Skagerrak strait between Norway and Denmark, the air bases in Denmark had to be seized. The domination of this strait would prevent the Royal Navy from interfering with the main supply lines of the invasion forces. In this respect, the occupation of Denmark was considered to be vital. The capture of Aalborg Airport was considered particularly important in this respect. The German Wehrmacht crossed the Danish border around 05:15 on 9 April. In a coordinated operation, German troops disembarked at the docks of Langelinie in the Danish capital, Copenhagen, and began occupying the city. German paratroops also captured Aalborg Airport. Simultaneously, an ultimatum was presented by the German ambassador to King Christian X. The Danish army was small, ill prepared and used obsolete equipment, but resisted in several parts of the country; most importantly, the Royal Guards located at Amalienborg Palace in Copenhagen, and forces in the vicinity of Haderslev in South Jutland. By 06:00, the small Danish Air Force had been taken out and 28 German Heinkel He 111 bombers were threatening to drop their bombs over Copenhagen. King Christian, having consulted with Prime Minister Thorvald Stauning, Foreign Minister P. Munch and the commanders of the army and the navy, decided to capitulate, believing that further resistance would only result in a useless loss of Danish lives. By 08:43 Denmark had capitulated. The Danish public was taken completely by surprise by the occupation, and was instructed by the government to cooperate with the German authorities. Germany's occupation of Denmark lasted until 5 May 1945. An important part of the Danish merchant marine escaped the occupation, as Arnold Peter Møller, President of the Mærsk shipping company, on 8 April instructed his ships on the high seas to move to Allied or neutral ports if at all possible. In a pre emptive move to prevent a German invasion, British forces occupied the Faroe Islands on 12 April 1940, then a Danish amt (county). The Danish county governor and the Faroese parliament Løgting governed the islands for the duration of the war.

Soon after this, the German landings at Trondheim, Bergen, and Stavanger, as well as the skirmishes in the Oslofjord became known. Not willing to disperse too thinly due to the unknown location of the two German battleships, the Home Fleet chose to focus on nearby Bergen and dispatched an attack force. RAF reconnaissance soon reported stronger opposition than anticipated, and this, along with the possibility that the Germans might be controlling the shore defences, caused them to recall the force and instead use the aircraft carrier to launch torpedo bombers at the enemy ships. The attack never commenced though, as Luftwaffe bombers launched an assault of their own against the Home Fleet first. This attack sank the destroyer and then forced the Home Fleet to withdraw north when their anti aircraft measures proved ineffective. This German air superiority in the area led the British to decide that all southern regions had to be left to submarines and the RAF, while surface vessels would concentrate on the north. Early the following morning, Warburton Lee led his flagship, , and four other destroyers into the Ofotfjord. At 04:30, he arrived at Narvik harbour and entered along with and , leaving and to guard the entrance and watch the shore batteries. The fog and snow were extremely heavy, allowing Warburton Lee's force to approach undetected. When they arrived at the harbour itself they found five German destroyers and opened fire, starting the First Battle of Narvik. Warburton Lee's ships made three passes on the enemy ships, being joined after the first by Hotspur and Hostile, and sank two of the destroyers, disabled one more, and sank six tankers and supply ships. The German commander, Commodore Friedrich Bonte, lost his life when his flagship German destroyer Z21 Wilhelm Heidkamp was sunk. However, Captain Warburton Lee would make a fatal error when he decided to attack the German destroyers one last time. The German destroyers from the North and West converged on the British Fleet at 06:00, while the British were preparing for the final attack. Hardy was severely damaged and beached, and Warburton Lee was killed. Hunter and Hotspur were both critically damaged, and Hotspur ran into the sinking Hunter. Hostile and Havock meanwhile had raced ahead, but turned about and came back to aid the retreat of Hotspur. The German destroyers were low on fuel and ammunition, allowing Hostile and Havock to come back to aid the retreat of Hotspur.

Shortly after the First Battle of Narvik, two more German ships were sunk by British forces. During the night of 9/10 April, the submarine intercepted and sank the light cruiser Karlsruhe shortly after she had left Kristiansand. On 10 April, the Fleet Air Arm made a long range attack from their base at RNAS Hatston (also called HMS Sparrowhawk) in the Orkney Islands against German warships in Bergen harbour. The attack sank the disabled German light cruiser Königsberg. On 10 April, Furious and the battleship joined the Home Fleet, and another air attack was made against Trondheim hoping to sink Admiral Hipper. Admiral Hipper, however, had already managed to escape through the watch set up outside of the port and was on her way back to Germany when the attack was launched; none of the remaining German destroyers or support ships were hit in the assault. Better luck was had in the south when severely damaged the heavy cruiser Lützow at midnight on 11 April, putting the German ship out of commission for a year. With it becoming more evident that the German fleet had slipped out of Norwegian waters, the Home Fleet continued north to Narvik in the hope of catching the remaining destroyers. En route the ships suffered further harassment from German bombers, forcing them to divert to the west away from the shoreline. By 12 April, they were in range of Narvik and an aerial attack on Narvik from Furious was attempted, but the results were disappointing. It was instead decided to send in the battleship Warspite and a powerful escort force, to be commanded by Whitworth. On the morning of 13 April, Whitworth's force entered the Vestfjord using Warspites Swordfish floatplane to guide the way. Aside from locating two of the German destroyers, the scouting aircraft also sank the U 64, the first submarine kill by an aircraft. Warspites destroyers travelled in advance of the battleship and were the first to engage their German counterparts which had come to meet them, thus starting the Second Battle of Narvik. Though neither side inflicted notable damage, the German ships were running low on ammunition and were gradually pushed back to the harbour. By that afternoon, most attempted to flee up the Rombaksfjord, the only exception being German destroyer Z19 Hermann Künne which beached herself as she made for the Herjangsfjord and was destroyed by Four British destroyers continued to chase the German ships up through the Rombaksfjord, Eskimo was soon damaged by the waiting opposition. However, the German situation was hopeless, having run out of fuel and ammunition, and by the time the remaining British ships arrived, the German crews had abandoned and scuttled their ships. By 18:30 the British ships were making their way out of the now cleared fjord.

The German invasions for the most part achieved their goal of simultaneous assault and caught the Norwegian forces off guard, a situation not aided by the Norwegian government's order for only a partial mobilization. Not all was lost for the Allies though, as the repulsion of the German Gruppe 5 in the Oslofjord gave a few additional hours of time which the Norwegians used to evacuate the royal family and the Norwegian Government to Hamar. With the government now fugitive, Vidkun Quisling used the opportunity to take control of a radio broadcasting station and announce a coup, with himself as the new Prime Minister of Norway. Quisling's coup and his list of new ministers was announced at 19:32. The Quisling coup government remained in place until 15 April, when the Administrative Council was appointed by the Supreme Court of Norway to deal with the civilian administration of the occupied areas of Norway, and Quisling resigned. In the evening of 9 April, the Norwegian Government moved to Elverum, believing Hamar to be insecure. All German demands were rejected and the Elverum Authorization was passed by the members of the parliament, giving the cabinet wide ranging powers to make decisions until the next time the Parliament could be assembled under ordinary circumstances. However, the bleakness of the situation prompted them to agree to continued negotiations with the Germans, set for the following day. As a precaution Colonel Otto Ruge, Inspector General of the Norwegian Infantry, set up a roadblock about 110 km (68 mi) north of Oslo, at Midtskogen. The Norwegian position was soon attacked by a small detachment of German troops, led by Eberhard Spiller, the air attaché for the German Embassy, who were racing north in an attempt to capture King Haakon VII. A skirmish broke out and the Germans turned back after Spiller was mortally wounded. On 10 April, the final negotiations between the Norwegians and Germans failed after the Norwegian delegates, led by Haakon VII, refused to accept the German demand for recognition of Quisling's new government. The same day, panic broke out in German occupied Oslo, following rumours of incoming British bombers. In what has since been known as "the panic day" the city's population fled to the surrounding countryside, not returning until late the same evening or the next day. Similar rumours led to mass panic in Egersund and other occupied coastal cities. The origins of the rumours have never been uncovered. On 11 April, the day after the German Norwegian negotiations had broken down, 19 German bombers attacked Elverum. The two hour bombing raid left the town centre in ruins and 41 people dead. The same day 11 Luftwaffe bombers also attacked the town of Nybergsund, in an attempt at killing the Norwegian King, Crown Prince Olav and cabinet. One of the final acts of the Norwegian authorities before dispersement was the promotion on 10 April of Otto Ruge to the rank of major general and appointment to Commanding General of the Norwegian Army, responsible for overseeing the resistance to the German invasion. Following the appointment of Ruge the Norwegian attitude became clear, with orders to stop the German advance being issued. On 11 April, after receiving reinforcements in Oslo, General Falkenhorst's offensive began; its goal was to link up Germany's scattered forces before the Norwegians could effectively mobilize or any major Allied intervention could take place. His first task was to secure the Oslofjord area, then to use the 196th and 163rd Infantry Divisions to establish contact with the forces at Trondheim.

When the nature of the German invasion became apparent to the British military, it began to make preparations for a counter attack. Dissension amongst the various branches was strong though, as the British Army, after conferring with Otto Ruge, wanted to assault Trondheim in Central Norway while Churchill insisted on reclaiming Narvik. It was decided to send troops to both locations as a compromise. Admiral Lord Cork was in overall command of the Allied operations.

After the appointment of Ruge as Commanding General on 10 April, the Norwegian strategy was to fight delaying actions against the Germans advancing northwards from Oslo to link up with the invasion forces at Trondheim. The main aim of the Norwegian effort in eastern Norway was to give the Allies enough time to recapture Trondheim, and start a counter offensive against the German main force in the Oslo area. The region surrounding the Oslofjord was defended by the 1st Division, commanded by Major General Carl Johan Erichsen. The rest of the region was covered by the 2nd Division, commanded by Major General Jacob Hvinden Haug. Having been prevented from mobilizing in an orderly fashion by the German invasion, improvised Norwegian units were sent into action against the Germans. Several of the units facing the German advance were led by officers especially selected by Ruge to replace commanders who had failed to show sufficient initiative and aggression in the early days of the campaign. The German offensive aimed at linking up their forces in Oslo and Trondheim began on 14 April, with an advance north from Oslo towards the Gudbrandsdalen and Østerdalen valleys. Hønefoss was the first town to fall to the advancing German forces. North of Hønefoss the Germans began meeting Norwegian resistance, first delaying actions and later units fighting organized defensive actions. During intense fighting with heavy casualties on both sides, troops of the Norwegian Infantry Regiment 6 blunted the German advance at the village of Haugsbygd on 15 April. The Germans only broke through the Norwegian lines at Haugsbygd the next day after employing panzers for the first time in Norway. Lacking anti tank weapons, the Norwegian troops could not hold back the German attack. The basis for the Norwegian strategy started collapsing already on 13 and 14 April, when the 3,000 troops of the 1st Division in Østfold evacuated across the Swedish border without orders, and were interned by the neutral Swedes. The same day that the 1st Division began crossing into Sweden, the two battalions of Infantry Regiment no. 3 at Heistadmoen Army Camp in Kongsberg capitulated. The 3rd Division, commanded by Major General Einar Liljedahl and tasked with defending southern Norway, surrendered to the Germans in Setesdal on 15 April, having seen no action up to that point. Some 2,000 soldiers marched into captivity in the Setesdal capitulation. With the abandonment on 20 April of the Franco British plans for recapturing the central Norwegian city of Trondheim, Ruge's strategy became practically infeasible. With the calling off of the Allied plans for recapturing Trondheim, British forces which had been landed at Åndalsnes moved into eastern Norway. By 20 April three British half battalions had moved as far south as Fåberg, near the town of Lillehammer. In a series of battles with Norwegian and British forces over the next weeks the Germans pushed northwards from Oslo, their main effort through the Gudbrandsdal valley. Particularly heavy fighting took place in places like Tretten, Fåvang, Vinstra, Kvam, Sjoa and Otta. In the Battle for Kvam on 25 and 26 April, the British managed to delay the German advance for two days of heavy fighting. Other German units broke through the Valdres and Østerdalen valleys, in the former case after heavy fighting and an initially successful Norwegian counterattack. During their advance northwards from Oslo the Germans regularly broke down Norwegian resistance using air strikes. Junkers Ju 87 dive bombers proved particularly effective in demoralizing Norwegian troops opposing the advance. The Norwegian forces' almost complete lack of anti aircraft weapons allowed the German aircraft to operate with near impunity.

After their capture of Kristiansand on 9 April the battalion strong German invasion force in southern Norway permitted the evacuation of the civilian population from the city. At the same time the Germans moved to secure the areas surrounding Kristiansand. After several days of confusion and episodes of panic among the Norwegian troops, despite the complete absence of fighting, the 2,000 men of the defending 3rd Division in Setesdal surrendered unconditionally on 15 April.

The important western cities of Bergen and Stavanger were captured by the Germans on 9 April. Some 2,000 German soldiers occupied Bergen and captured the Norwegian arms depots there. The small Norwegian infantry forces in Bergen retreated eastwards, blowing up two railway bridges and sections of road after them. Despite the loss of the cities, the regional commander, General William Steffens, ordered a total mobilization. During mid April the 6,000 strong Norwegian 4th Division, responsible for the defence of western Norway, was mobilized around the town of Voss in Hordaland. The 4th Division was the only military district outside of northern Norway to be mobilized completely and in an orderly fashion. The soldiers of the 4th Division managed to repulse the initial German push along the Bergen Line railway line connecting western and eastern Norway. After troops of the more northerly 5th Division had covered the British landings at Åndalsnes, Steffens planned an offensive aimed at recapturing Bergen. Norwegian naval forces, organized into three regional commands by Admiral Tank Nielsen, prevented German intrusions into Hardangerfjord and Sognefjord. In total the Royal Norwegian Navy fielded some 17–18 warships and five to six aircraft in western Norway following the German capture of Bergen. After the Luftwaffe bombed and severely damaged Voss and the surrounding countryside on 23–25 April, inflicting civilian casualties, the Germans captured the town on 26 April. Following the fall of Voss, General Steffens evacuated the remains of his forces northward, evacuating the south side of the Sognefjord on 28 May (except for a small contingent at Lærdal). He set up his own headquarters at Førde and prepared for the further defence of Sogn og Fjordane. On 30 April a message from General Otto Ruge was communicated, telling of the evacuation of all allied troops and also of the King and Army command, from southern Norway. With no help forthcoming from either allied or Norwegian forces, on 1 May 1940, Steffens ordered his troops to disband. On the night between 1 May and 2 May, Steffens left for Tromsø with three naval aircraft, effectively ending the campaign in the region. No allied land troops had been involved in the fighting in Hordaland and Sogn og Fjordane. Another two aircraft flew to the United Kingdom to undergo service. Although the Royal Norwegian Navy's ships in western Norway were ordered to evacuate to the United Kingdom or northern Norway, only the auxiliary sailed to the United Kingdom and Steinar to northern Norway. The remaining ships were either prevented from leaving due to massive desertions, or had commanders who chose to disband their men rather than risk the voyages to Allied controlled territory. The last Norwegian forces in western Norway only disbanded in Florø on 18 May 1940.

The original plans for the campaign in Central Norway called for a three pronged attack against Trondheim by Allied forces while the Norwegians contained the German forces to the south. A British vanguard force arrived at Åndalsnes on 12 April. The main landing of Sickleforce, consisting primarily of the British 148th Infantry Brigade and commanded by Major General Bernard Paget, occurred on 17 April. The successful Norwegian mobilization in the area opened the opportunity for the British landings. During the trip the force had been transferred to destroyers instead of bulky transport ships due to the narrow waters of the fjord leading to Namsos; in the confusion of the transfer a great deal of their supplies and even the brigade commander were misplaced. Another great problem for Mauriceforce was the lack of air support and effective anti aircraft defences, something of which the Luftwaffe took full advantage. On 17 April the force moved forward from Namsos to positions around the village of Follafoss and the town of Steinkjer. Regardless, he moved 130 km (81 mi) inland to Steinkjer and linked up with the Norwegian 5th Division. Constant aerial harassment prevented any kind of offensive from taking place though, and on 21 April Mauriceforce was attacked by the German 181st Division from Trondheim. De Wiart was forced to fall back from these assaults, leaving Steinkjer for the Germans. On 21 and 22 April Steinkjer was bombed by the Luftwaffe, leaving four fifths of the town in ruins and more than 2,000 people homeless. By 24 April Steinkjer and the surrounding areas had been occupied by the Germans.

By 28 April, with both groups checked by the Germans, the Allied leadership decided to withdraw all British and French forces from the southern and central regions of Norway. The town of Ålesund had also suffered heavily from German bombing during the last days of April. Sickleforce managed to return to Åndalsnes and escape by 2 May at 02:00, only a few hours before the German 196th Division captured the port.

In northern Norway the Norwegian 6th division, commanded by General Carl Gustav Fleischer, faced the German invasion forces at Narvik. Following the German invasion General Fleischer assumed the position of commander in chief of all Norwegian forces in northern Norway. The Norwegian counter offensive against the Germans at Narvik was hampered by Fleischer's decision to retain significant forces in Eastern Finnmark to guard against a possible Soviet attack in the far north. The force consisted of the 24th Guards Brigade, led by Brigadier William Fraser, and French and Polish units led by Brigadier Antoine Béthouart. On 15 April, the Allies scored a significant victory when the Royal Navy destroyers and , which were escorting the troop carrying Convoy NP1, forced the German U boat U 49 was launched in 1939. to surface and scuttle in the Vågsfjorden. Found floating around the sinking U boat were documents detailing the dispositions, codes and operational orders of all U boats in the Norwegian operational area, providing the Allies with an efficient and valuable tool when planning troop and supply convoys to the campaign in northern Norway. After the Allied failure in Central Norway, more preparation was given to the northern forces. Air cover was provided by two squadrons of carrier transported fighters operating from Bardufoss Air Station, the re equipped No. 263 Squadron RAF with Gloster Gladiators and No. 46 Squadron RAF with Hawker Hurricanes. As part of the Allied counter offensive in northern Norway, French forces made an amphibious landing at Bjerkvik on 13 May. The naval gunfire from supporting Allied warships destroyed most of the village and killed 14 civilians before the Germans were dislodged from Bjerkvik. In late April, ten Independent Companies had been formed in Britain, commanded by Lieutenant Colonel Colin Gubbins. On 2 May, four of these companies were formed into "Scissorsforce", under Gubbins, and dispatched to forestall the Germans at Bodø, Mo i Rana and Mosjøen. Although they ambushed the leading German units south of Mosjøen they were outmatched by the German main body and were withdrawn to Bodø, which was to be defended by the 24th Guards Brigade. As the 24th Guards Brigade moved to Bodø, the destroyer , which was carrying Brigadier Fraser, was bombed and was forced to return to Britain. Gubbins, with the acting rank of colonel, assumed command of the brigade. On 15 May the troop ship carrying the 1st Irish Guards was bombed, with heavy casualties to the troops, and two days later the cruiser went aground while carrying much of the equipment of the 2nd South Wales Borderers. Both battalions returned to Harstad to reform and to be re equipped before setting out again for Bodø. As the Germans advanced northward from a railhead at Mosjøen, the garrison of Mo i Rana (a mixed force based on the 1st Scots Guards) withdrew on 18 May, too precipitately in Gubbins's opinion. The commanding officer of the Scots Guards, Lieutenant Colonel Thomas Byrnand Trappes Lomax, continued to retreat despite orders to hold successive positions which, with the delayed arrival of the rest of the brigade, left Gubbins no time to prepare a defensive position at Storjord. The brigade withdrew under heavy pressure across Skjerstad Fjord on 25 May, covered by a rearguard from the 1st Irish Guards and several of the Independent Companies under Lieutenant Colonel Hugh Stockwell. In the evening of 27 May Bodø was bombed and strafed by the Luftwaffe. The bombing raid destroyed the recently constructed improvised airstrip, the radio station and 420 of the town's 760 buildings, killing 15 people and leaving a further 5,000 homeless in the process. Gubbins's force was evacuated from Bodø from 30 May to 2 June. During these three days, low cloud prevented the Luftwaffe interfering. The improvised air strip which had been hit during the 27 May air raid fell into German hands, providing the Germans with an air base much closer to the Narvik fighting, and was of great significance for their continued advance northwards. On 28 May, two French and one Norwegian battalion attacked and recaptured Narvik from the Germans. To the south of the city Polish troops advanced eastwards along the Beisfjord. Other Norwegian troops were pushing the Germans back towards the Swedish border near Bjørnfjell. However, the German invasion of France and the Low Countries had immensely altered the overall situation of the war and the importance of Norway was considerably lessened. On 25 May, three days before the recapture of Narvik, the Allied commanders had received orders to evacuate from Norway. The attack on the city was in part carried out to mask from the Germans the Allies' intention of leaving Norway. Shortly after the 28 May Allied recapture of Narvik, the city was bombed and heavily damaged by the Luftwaffe. Without supplies from the Allies the Norwegian Army would soon have been unable to continue the fight. By 8 June, after destroying rail lines and port facilities, all Allied troops had been evacuated. The Germans had launched Operation Juno to relieve pressure on the Narvik garrison and, after discovering the evacuation, shifted the mission to hunt and subsequently sunk two British destroyers and the aircraft carrier Before the British warships were sunk, however, the destroyer torpedoed and damaged Scharnhorst. Shortly after the encounter the British submarine intercepted the German ships and torpedoed Gneisenau, causing severe damage. A capitulation agreement for the Norwegian forces fighting at Narvik was also signed the same day, at Bjørnfjell. The signatories of this agreement, the last local capitulation of Norwegian troops during the campaign, were General Eduard Dietl for the Germans, and Lieutenant Colonel Harald Wrede Holm for the Norwegians. The 62 day campaign made Norway the country to withstand a German invasion for the longest period of time, aside from the Soviet Union.

With the capitulation of Norway's mainland army a German occupation of the country began. The civilian side of the German occupation of Norway was organized through the establishment of the Reichskommissariat Norwegen, led from 24 April by Josef Terboven. The Administrative Council, appointed by the Norwegian Supreme Court on 15 April to stand in for the Norwegian government in the occupied territories, functioned until 25 September. After that date the Norwegian partner of the occupying Germans was the fascist Quisling regime, in one form or another. The forces soon saw extensive combat in the convoy battles of the North Atlantic and in the air war over Europe. The ranks of the Navy and Air Force were swollen by a steady trickle of refugees making their way out of occupied Norway, and their equipment brought up to standard by British and American aircraft and ships. From a force of 15 ships in June 1940, the Royal Norwegian Navy had expanded to 58 warships by the end of the Second World War in Europe. The ships were manned by around 7,000 crew members. In all 118 warships had been under Norwegian command at one time or another during the war years. A c. 4,000 strong Norwegian Army was also re established in Scotland. However, with the exception of a small number of special forces, it saw little action for the rest of the war. A reinforced company from the Scotland based Norwegian Army participated in the liberation of Finnmark during the winter of 1944–45. Finnmark and the northern parts of Troms county had been forcibly evacuated by the Germans in a scorched earth operation following the Petsamo–Kirkenes Offensive by the Red Army against occupied Finnmark in October 1944. The offensive had captured the north eastern town of Kirkenes from the occupying German forces. After the arrival of the 300 troops from Scotland, further troops were moved in from Sweden and mobilized locally. At the end of the war, the Norwegian forces in Finnmark totalled 3,000. In the course of this operation, there were some minor skirmishes with German rear guards and patrols. In neutral Sweden there was also a Norwegian build up of forces in the last two years of the war through the so called "police troops" established with the support of Swedish authorities. The term "police" served as a cover up for what in reality was pure military training of a force mustering around 13,000 well trained and equipped troops by VE day. In 1945 around 1,300 "police troops" took part in the Liberation of Finnmark. Aside from the regular Norwegian forces, the main armed resistance movement in Norway, the exile government controlled Milorg, fielded some 40,000 combatants at the end of the war. In November 1941 Milorg had been declared by the exiled Norwegian government to be the fourth branch of the Norwegian Armed Forces. The German losses at sea were heavy, with the sinking of one of the Kriegsmarine's two heavy cruisers, two of its six light cruisers, 10 of its 20 destroyers and six U boats. With several more ships severely damaged, the German surface fleet had only three cruisers and four destroyers operational in the aftermath of the Norwegian Campaign. Two torpedo boats and 15 light naval units were also lost during the campaign. Two German battleships and two cruisers were damaged during the campaign. Official German sources give the number of German aircraft lost during the Norwegian Campaign as 90, with other estimates by historian François Kersaudy ranging as high as 240.

The Norwegian and Allied casualties of the Norwegian Campaign totalled around 6,602. The British lost 1,869 killed, wounded and missing on land and approximately 2,500 at sea, while the French and Polish lost 533 killed, wounded and missing. On the Norwegian side there were around 1,700 casualties, of whom 860 were killed. Some 400 Norwegian civilians were also killed, mostly in German bombing raids. On the naval side of the Norwegian casualties, the Royal Norwegian Navy, fielding 121 mostly outdated ships at the outset of the German invasion, was virtually wiped out during the campaign. Only 15 warships, including a captured German fishing trawler, with some 600 men had managed to evacuate to the United Kingdom by the end of the fighting. The remaining Norwegian naval vessels were sunk in action, scuttled by their own crews, or captured by the Germans. Among the warships sunk in action during the campaign were two coastal defence ships and two destroyers. Seven torpedo boats were also sunk or scuttled, while the remaining ten were captured by the Germans. Only one of the nine Norwegian submarines managed to escape to the United Kingdom, the other eight being scuttled or captured. Some 50 captured Norwegian naval ships were over time pressed into service by the Kriegsmarine. Through the Norwegian government's Nortraship system, the Allies also gained the services of the Norwegian merchant navy, the fourth largest in the world. The 1,028 ship strong Nortraship was established on 22 April at a government meeting at Stuguflåten in Romsdal. The Nortraship fleet consisted of some 85% of the pre war Norwegian merchant fleet, the remaining 15% having been in Norway when the Germans invaded and been unable to escape. The Nortraship vessels were crewed by 27,000 sailors. In total 43 free Norwegian ships were sunk during the Norwegian Campaign, while another 29 were interned by the neutral Swedes. Nortraship gave the Norwegian government in exile economic independence and a basis for continued resistance from abroad. The German occupation of Norway was to prove a thorn in the side of the Allies during the next few years. Bombers based at Sola had a round trip of about 920 km to Rattray Head in north east Scotland, instead of a round trip of about 1,400 km from the nearest airfield on German soil (the island of Sylt), while the east of Scotland and coastal shipping suffered from bombing raids, most from Norway, until 1943. After the fall of Norway, Scotland (especially the fleet bases at Scapa Flow and Rosyth) were seen as much more vulnerable to a diversionary assault by air and sea borne troops. German commerce raiders used Norway as a staging base to reach the North Atlantic. After Germany invaded the Soviet Union in 1941, air bases in Norway were also used to interdict the Allied Arctic convoys there, inflicting painful losses to shipping.