Although the
Royal Danish Army was warned of the attack, it was denied permission to deploy or prepare defensive positions as the Danish government did not want to give the Germans any provocation for their actions. Only small and scattered units of the frontier guard and elements of the Jutland (Jylland) division were available to meet the land invasion. Believing the attack was imminent, the troops were placed on full alert at 13:30 on 8 April.
Fighting in Jutland The Danish border was breached at
Sæd,
Rens,
Padborg, and
Krusaa (Kruså) at 04:15 on the 9th. With the
Kriegsmarine simultaneously landing troops at
Lillebælt, Danish troops at the border were cut off at the beginning of the fighting. The alarm was sounded at 04:17, and the first Danish troops were dispatched at 04:35.
Eastern flank Lundtoftbjerg The first clash between the Danish Army and the invading forces occurred at
Lundtoftbjerg, where a Danish anti-tank platoon armed with two 20 mm guns and a light machine gun had taken up positions covering the road. A German column appeared at 04:50, and the 20 mm cannons opened fire on the armoured cars while the machine gun took aim at the motorcyclists. A fire started in a nearby barn, filling the air with smoke and hindering the German advance. Eventually the anti-tank platoon was forced to withdraw to
Aabenraa. About to the north, a
bicycle platoon prepared a defence of a railway bridge, but fire from the armoured cars and strafing fighter aircraft forced them to retreat, and a third of them were captured. The Germans lost two
armoured cars and three motorcycles, while the Danes suffered one dead and one wounded. Another German column reached
Hokkerup a few kilometers east of Lundtoftbjerg at 05:30. They encountered a roadblock made with farm equipment, set up only 20 minutes earlier by 34 Danish soldiers. The Danes knocked out the three leading armoured cars, forcing the remaining armoured cars to withdraw. The Germans set up a 37 mm gun away, but it managed to fire only one round before being knocked out by two rounds from a 20 mm gun. Hand-to hand combat ensued in which one Dane was killed and three wounded, one fatally. With air support, the 100 or so Germans managed to surround and capture the Danish unit at 06:15.
Bjergskov north of Lundtoftbjerg, one motorcycle and two bicycle platoons arrived at Bjergskov at around 05:00. Under Lieutenant Colonel S. E. Clausen the motorcycle troops set up a roadblock with two 20 mm guns while the remaining platoons spread out in the woods. A German column arrived at 06:30. Their tanks pushed the roadblock aside and opened fire. One gun returned fire until a tank drove over it. The gunner attempted to run for cover in the woods but was killed when a German aircraft strafed the road. The second gun malfunctioned. The Danes tried to escape on motorcycles but the Germans surrounded them with armoured vehicles and captured them. A further four Danish soldiers were wounded, while one German armored car was damaged.
Central thrust Bredevad In an encounter between Danish and German forces at Bredevad, north of the border, a German vanguard of four armoured cars approached the village. The Danes arrived at 6:30 AM and, without time to build a roadblock, took cover in a garden. A machine gun and a 20 mm cannon, manned by one and a half platoons, fired warning shots. When the Germans ignored this, the Danes opened fire from 300 meters (yards) out, knocking out the lead armoured car and killing its driver. A short skirmish followed. The Danes knocked out three more German armoured cars and suffered four casualties. At 07:15 a reinforcing German motorised column arrived from
Tinglev, cutting off the Danes and forcing them to surrender. Two Danes were killed and five were wounded.
Rabsted A cyclist platoon from Korskro arrived at Rabsted at 6:45. While lying in wait, they managed to capture two German dispatch riders. Learning from them that Bredevad had been taken, they retreated to the northeast via secondary roads.
Aabenraa at Aabenraa As the Danish forces at
Søgaard army camp prepared to pull back north to
Vejle, where the main force of the Jutland (Jylland) Division was preparing for battle, a short skirmish occurred at Aabenraa as the anti-tank platoon from Lundtoftbjerg attacked 15 or so pursuing German vehicles. After disabling a German tank, the rearguard pulled back to Knivsberg. They rendezvoused with a bicycle platoon from Stubbæk Skov, which had suffered one killed and three wounded by German aircraft. The Danish CO ordered them to northern Haderslev.
Haderslev Haderslev had a garrison of 225 men of the Jutland (Jylland) Division under Colonel A. Hartz, which defended both the
barracks in the town and the road leading to it. Troops in the town mobilised at 07:00 on hearing instructions broadcast from police loudspeaker vans. Bolstered by retreating units, approximately 400 Danes defended the town. Three roadblocks were set up: one with dumping wagons, the other two from spare lumber. At about 07:50 on the southern outskirts of Haderslev, a Danish
37 mm anti-tank gun with a crew of five attacked the approaching armour. Two German tanks lined up adjacent to one another and opened fire. The Danes landed all three of their shots—one in a tank's tracks—but two of the gun crew were killed and the rest wounded. One tank then drove over the gun. Around the curve on Sønderbro Street, two 20 mm cannon and a machine gun put up resistance at the wagon roadblock. The Germans laid down heavy fire. A Danish soldier was killed and two were wounded, but the Germans were effectively pinned down. The fighting continued for ten minutes until the order to surrender was received from Copenhagen (København) by telephone. The Germans were then allowed to proceed into Haderslev, but the Danish garrison stationed there had not received the order to surrender and fired on them. Two German tanks and a motorcycle proceeded unsuspecting towards the barracks, which were defended by the anti-tank unit from Lundtoftbjerg. They opened fire, killing the motorcyclist and blowing the tracks off one tank, sending it crashing into a house. However, the Danish garrison capitulated at 08:15 when the order to surrender finally came through. One Danish soldier was killed while defending the barracks, and three civilians were killed in the crossfire.
Western flank Abild and Sølsted The first fighting in Western Jutland (Jylland) occurred against the
Tønder garrison, which was dispatched to
Abild and
Sølsted. At Abild, a Danish 20 mm gun crew knocked out two German armoured cars of the German 11th Motorised Regiment before pulling back. At Sølsted, a Danish anti-tank unit consisting of fewer than 50 men set up a defensive position with a 20 mm gun on a road. When a force of the German 11th Motorised Regiment approached, the Danes opened fire as soon as the first German armoured car came within range. The first vehicle was knocked out and ended up in a ditch, while the next continued forward, but pulled back after being hit. It was hit several more times, but was able to fire back. German infantry attempted twice to outflank the Danish positions, but both attempts were met with heavy fire and they became bogged down. Seeing that his attack was failing, the German regimental commander radioed for support and three German
Henschel Hs 126 aircraft soon appeared. They bombed and strafed the Danish force until the Danish commander ordered his troops to fall back to Bredebo. In spite of this, no Danish casualties were reported. When the men of the Tønder garrison reached Bredebro, the order to capitulate had been issued and the fighting was over.
Airborne landings At approximately 05:00, history's first paratrooper attack took place. 96
Fallschirmjäger jumped from nine
Junkers Ju 52 transport aircraft to secure
Storstrøm Bridge, connecting the island of
Falster with Zealand (Sjælland) and the coastal fortress on
Masnedø island. The elite German troops expected heavy fighting around the fortress, but much to their surprise, only two privates and an officer were found inside. The landing opened the way for a battalion of the
198. Infanterie-Division to advance on Copenhagen (København) by land. Two hours later, a platoon of paratroopers from the 4th battalion of Fallschirmjäger Regiment I landed in Aalborg, the main city of northern Jutland (Jylland), to secure ''Weserübung Süd's
primary target: the airfield at Aalborg, to be used as a stepping-stone for the invasion of Norway. The Fallschirmjäger'' encountered no resistance, and in less than an hour German aircraft were landing there in huge numbers. More than 200 landings and takeoffs were recorded on the first day, most of them transporting troops and fuel to
Fornebu Airport in Norway. In
Esbjerg, a 75mm anti-aircraft gun damaged a German aircraft.
Naval landings '' at Korsør In order to capture the connections between Jutland (Jylland) and
Zealand (Sjælland), the
Kriegsmarine landed more troops from the 198th Infantry Division at Funen (Fyn). At the same time, troops supported by the battleship
Schleswig-Holstein landed in
Korsør and
Nyborg, cutting off connections between
Funen (Fyn) and Zealand (Sjælland). Meeting no resistance, the troops in Korsør reached Copenhagen (København) at noon. Shortly earlier, at 03:55, the Germans made a surprise attack on
Gedser, Denmark's southernmost city. They utilised the local ferry from
Warnemünde, which they crammed with troops. Soldiers swarmed inland and cut telephone lines. Armour and motorcycles followed, and rapidly advanced to and captured the Storstrøm Bridge together with the paratroopers.
Capture of Copenhagen To secure Denmark's quick surrender, the capture of the capital city was considered essential. At 04:20 the 2,430 ton minelayer , with an escort of the icebreaker and two
patrol boats, entered Copenhagen (København) harbour with
battle flags flying. The harbour was covered by the
coastal artillery guns of
Fort Middelgrund. The newly appointed Danish commander ordered a warning shot to be fired, but the recently arrived recruits could not operate the gun. After landing a battalion of the 198th Infantry at 05:18, German forces captured the 70-strong garrison of
Kastellet, the headquarters of the Danish Army, without a single shot. Their next target was
Amalienborg Palace, residence of the Danish royal family.
Amalienborg and capitulation The 198th Infantry Battalion advanced on Amalienborg along three converging axes,
Bredgade,
Amaliegade, and
Toldbodgade, intending to encircle the palace before a defense could be organised. Unbeknownst to them, the commandant of Kastellet, Christian Peter Bokkenheuser, had managed to raise the alarm with the
Royal Guard in the final moments before his arrest. The Germans were therefore met almost immediately by fierce, disciplined resistance from the on-duty company, who awaited them already entrenched in firing positions. The initial assault was repulsed, leaving three Guardsmen and four Germans wounded. The situation then escalated as Danish reinforcements arrived from
Rosenborg Barracks, bringing with them multiple
Madsen machine guns. What followed was a chaotic and intense street battle that quickly spread across the entire quarter. Both sides probed for flanks, trading heavy fire through streets and passages, with the fiercest clashes raging along
Bredgade, that ultimately brought the German advance to a complete halt. The dogged resistance of the Royal Guard gave King
Christian X and his ministers time to confer with the Danish commander-in-chief
General Prior. During the discussions, several formations of
Heinkel He 111 and
Dornier Do 17 bombers from
Kampfgeschwader 4 roared over the city dropping
OPROP! leaflets. Faced with the explicit threat of
Luftwaffe bombing Copenhagen's civilian population, all but General Prior favoured surrender. The argument for surrender was that Denmark's military position was untenable. Its land and population were too small to hold out against Germany for any sustained period, and its flat terrain would be easily overrun by German
panzers. (Jutland (Jylland), for instance, was wide open to a panzer attack from
Schleswig-Holstein to the south.) Unlike Norway, Denmark had no mountain ranges where a drawn-out resistance could be mounted. On the other hand, Denmark had significant water obstacles between the panzers and the capital city, Copenhagen (København), a long coastline, and a significant navy that could expect help from Great Britain and France. A third option, the government going into exile as the Czechoslovak government had done, was not chosen, in part because the King and the Crown Prince profoundly refused to leave the Crown Princess behind as she was in the ninth month of pregnancy and therefore immobile. The Danish government ordered a ceasefire at 06:00, and formally capitulated at 08:34 in exchange for retaining political independence in domestic matters. The decision to stand down and disarm the Royal Guard caused great frustration among the Guardsmen, who firmly believed that they could successfully expel the Germans from the capital. This frustration boiled over into an uproar, during which the Guardsmen attempted to rearm themselves to launch a direct assault on
Kastellet, where the Germans had positioned their temporary headquarters. However, the officers argued that even if the Guardsmen were able to drive out the initial German troops, more overwhelming forces would inevitably arrive soon after. As a result of these discussions, the Guardsmen eventually abandoned their efforts to resist the Germans.
Fate of the Danish Air Services s destroyed at Værløse The entire four squadron Danish Army Air Service was stationed at
Værløse near Copenhagen (København). In anticipation of the German invasion, they had prepared to disperse to airfields around the country, but this had not been accomplished by 05:25 when
Luftwaffe aircraft appeared over the airbase. As the German aircraft reached Værløse, one
Fokker C.V-E reconnaissance aircraft was getting airborne, but was shot down by a
Messerschmitt Bf 110 flown by
Hauptmann Wolfgang Falck at an altitude of . Both crew members were killed. The German Bf 110s then strafed the base under heavy anti-aircraft fire. They destroyed 11 aircraft and badly damaged another 14 as they taxied to take-off, wiping out most of the Danish Army Air Service in one action. The Danish Navy Air Service remained at its bases and escaped damage.
1st company of the 11th battalion While most of the Danish Army followed the order to surrender, one unit refused. Colonel , commander of the 4th Regiment at
Roskilde, believed that the order to surrender had been forced on the government by the Germans and that
Sweden had also been attacked. Bennike and his unit boarded the ferry in
Elsinore to Sweden and went into exile. When the misunderstanding was later cleared up, most of the Danish soldiers stayed in Sweden and would form the core of the
Danish Brigade in Sweden in 1943.
Casualties For propaganda purposes, the German High Command tried to present the invasion of Denmark as a peaceful one, so it would be believed that Denmark did not put up any resistance to it. In his first monograph, author Kay Søren Nielsen states that in the archives of the Danish weapons manufacturer
DISA (Danish Industrial Syndicate), 203 German soldiers were claimed to be killed in Jutland (Jylland). This number is also backed up by testimonies from veterans and eyewitnesses, including the veteran Frode Jensen, who after the battle was over, was told by the Germans, that they had lost 18 men while his unit had only suffered 2 casualties. However, the number is considered an exaggeration by many historians. In 2015, the Journal of Military History,
Krigshistorisk Tidsskrift, published an article for the
Royal Danish Defence College in which military correspondent Lt. Col Jürgensen H.J. (ret.) summarised key points in the German invasion. He argued that actual German losses were 2–3 killed and 25–30 wounded, and that the Danish military suffered a confirmed 16 dead and 20 wounded. Casualties among the civil resistance is not certain, but are given as 10 dead and 3 wounded. Military historian
David T. Zabecki notes in
"Germany at War: 400 Years of Military History" that Denmark suffered 49 casualties (26 killed and 23 wounded), and that 20 German soldiers were killed or wounded. Other than the casualties at the front, a few aircraft were shot down or crashed, a
tugboat sank after a collision with a German vessel in the
Great Belt and the German battleship
Schleswig-Holstein was temporarily grounded west of
Agersø. == Order of battle ==