Sorry for the long wait, everyone. I had to prepare and finish my exams but after that was done, I hadn't thought of continuing this TL until I got back the strength to write it.
Part 2: The Call of Valhalla
As soon as the ultimatum came and pass, the Swedish army began marching across the border. Sweden had both the men and the equipment necessary to fight the lesser populated Norway. On the other hand, the Norwegians had the upper hand in tactics. Although they knew they couldn't stop the blonde-haired behemoths coming their way, they could at least slow it down for more time.
After capturing a couple of towns near the border, the swedes advanced on Fredrikstad thinking it was another walk in the park. What they couldn't expect was resistance. As soon as they got near the outskirts of the city, they were met by a hail of bullets coming from the trees and bushes. Several platoons of militia along with members from the shooting clubs had taken up positions around the city.
For 3 days, gunfire was exchanged from street to street until Fredrikstad was finally cleared of the militias and the Swedes were on the move again. With this news, the Norwegian government decided to deploy its regular troops to stall the Swedish advance for time and evacuate to another city somewhere east while its newly created but unrecognized foreign ministry looked for support in Europe or elsewhere.

A group of militiamen poses for the camera before marching out to engage the Swedes. The role of the militias played in the defense of Norway had greatly influenced strategic thinking regarding guerilla warfare for the new century.
As Scandinavians fought Scandinavians, the continent looked on in keen observation. Britain, keen on maintaining its trading interests, covertly backed the Norwegians along with France and Russia. The French sent token support to one-up their German rivals. As a country more aligned to Germany than Britain, Sweden received its support from the Germans which included military advisors. They also received powerful Krupp artillery guns from the Austrians as a token gesture of support.
As the Swedish army got closer and closer to Christiania, the Storting was packing up for a train ride to Bergen to escape arrest. In his diary, Prime Minister Christian Michelsen wrote:
"
I don't know how tough this will be. The Swedes are not that far from here and I fear for my safety along with my family. If things don't change, this could be the end for me".
Indeed they did fear for their lives as the Swedes had issued arrest warrants for the capture of Michelsen and members of his cabinet. They had even put a 500,000 kronor bounty on their capture as well.
The seas weren't quiet either. When the ultimatum expired, the Swedish navy immediately sailed for Christiania. While doing so, they sent smaller fleets to the other coastal cities such as Kristiansand and Stavanger to land troops and outflank the Norwegians. Both landings were successful as resistance in the cities was minimal due to most of the Norwegian troops withdrawing deep into the countryside. Things seemed to be getting worse and worse.
On September 15, the Swedish army had reached the outskirts of the Norwegian capital. Wanting to capture the city unscathed, they sent an envoy inside to negotiate its surrender but the defenders ultimately refused the offer. Having no choice, the Swedish commander, Knut Bildt, ordered his forces to assault the city in one grand assault. Defending the city were a hodgepodge of militiamen, local volunteers, and some regular army units.
Like the Caroleans of a bygone era, the Swedes descended upon the city coming straight up from Lambertseter. They advanced under heavy fire among the suburbs as they inched closer and closer towards the heart of Christiania. One by one, the various city landmarks fell to the attackers as the Norwegians were in retreat across the city. The sounds of rifle and machine-gun fire along with the occasional artillery bombardment echoed across the capital at a constant occurrence. The fighting was so bad that one German officer present during the battle remarked: "It was like Peking all over again; the whole damn city was devastated".
Amidst the chaos, a company of soldiers and militiamen had entrenched themselves inside Akershus fortress. Knowing the city was about to fall, they nevertheless sat tight and waited for the Swedes to come. Once they came, they unleashed hell upon the attackers like there was no tomorrow. For days, the Swedes besieged the fortress, having it cut off from the outside world. Every assault the Swedes launched on Akershus were repelled, giving them no choice but to shell the fortress into ruins.
Despite the shelling, the defenders had sought shelter inside the castle's tunnels for cover and were their stockpiled ammunition was stored. Some of them had even brought machine guns and grenades. Throughout the siege, the Norwegians lived off whatever food they brought with them and it wasn't long before they started to starve.
After 4 days of countless shelling and attacks, the swedes launched their biggest assault on the fortress and had finally captured it along with the few survivors of what was left of the company. In a spectacle designed for the cameras and press, the swedes raised two flags: The flag of Sweden and the Union mark. After that, the Swedish commander brought the Norwegian command tasked with defending the city for a surrender ceremony. Salutes were exchanged, papers were signed and the order was given out to those troops that hadn't left the city by now to lay down their arms and surrender. One American journalist would call the Siege of Akershus, the 'Nordic Alamo'.
The Akershus fortress sustained heavy damage during the fighting that took place. After the war, the historic landmark was restored to its former glory but would become the site for Norway's commemoration of its fight for independence. The siege would become romanticized in various books and movies as a heroic last stand alongside the likes of Thermopylae, Alamo and Little Big Horn.
While confidence at home about crushing the secession was high among the Swedish elite, including the middle class, it was less so for the workers and farmers. The working class, having been seduced by the sweet sounds of socialism, weren't so enthusiastic about going to fight against a nation that voted for independence, voter fraud or not. With the outbreak of war, many on the left such as the Social Democrats began protesting against the war although they were a minority at first. To the king and the Riksdag, snuffing out the illegal secession of Norway was their utmost priority. They would find soon find out there was going to get more complicated.
Across Europe, the carnage unfolding in Norway was reported widely. The average citizen was glued to their papers reading every story about the war while the diplomats were busy at work finding a way to use the conflict for furthering their nation's interest. Their plans would soon be tested later on.
While the main focus of the campaign was the advance on Christiania, other areas of the country were also active. Despite having the numbers and equipment needed to conquer the country, the Swedes were having a hard time advancing in the countryside. A Swedish advance on the port city of Trondheim was stopped halfway there due to guerrilla attacks and the strong defenses constructed by the Norwegians. Not to mention, a raid on Narvik was also repulsed by the Norwegians as they knew the terrain like the back of their hand. The only way the Swedes could advance would be to traverse the various mountain passes and fjords that make up the country's distinct geography.
Norwegian army troops of the Jäger corps take up defensive positions on the road leading to Trondheim.
The Swedish chief of staff was living on borrowed time as the longer they took, the increasing chances of a great power involvement seemed more and more likely. Not to mention if the war went on for much longer, public opinion would slowly turn against it. They planned to advance along the coast, linking up with the landing troops in Kristiansand and Stavanger. The Storting, having moved to Bergen, was sending out requests for international support and even volunteers from other countries. Soon hundreds would arrive places like Iceland, Netherlands, Britain and more importantly Denmark. Enough Danes had volunteered to form a brigade and would become a renowned unit for its fighting prowess.
***
London
It was a quiet night. The streets were usually filled with those going home for the evening and enjoying the time with their families. Westminster was asleep and all of its MPs were either back in their constituencies or enjoying the night in their posh London homes. The Royal Family was soundly asleep in Buckingham Palace except the various guards posted around the palace. The beating heart of the most powerful nation on earth was sleeping, except for one man.
In 10 Downing street, Prime Minister Arthur Balfour was still awake in his office pondering about the events unfolding in Scandinavia. His greatest fear was a nation becoming fully aligned to German interests that would've joined the Central Powers. If that would happen, the gateway to the Baltic Sea would be closed and trade with Russia would be cut off. As a result, the British decided to place their support behind Norway.
After pondering for what seemed like forever, Balfour had come up with a plan to 'maintain the balance of power and protect British interests'. Before going to sleep, he drafted his plan for an upcoming meeting with his cabinet and eventually for Parliament. Always reminded of his wife nagging him to come to bed, he prepared notes for the day tomorrow and finally went to bed. In his head, he only had two words to say to those that would block Britain from gaining an advantage anywhere in Europe.
"
Not today".