Scenario: 2028 Invasion of Britain

Note: This is my first attempt at creating a scenario, so if you want to criticize and provide tips for improvement, go ahead.

The 2028 Invasion of Britain, also known as the Great British War, was a conflict that occured on the British Isles between March 11th, 2028 and ???. The war was launched by the Britannia Federation, a far-right group who seized power in Britain in 2024, and they sought to rebuild the British Empire and transform the United Kingdom into a global superpower. The war was started due to Britain's invasion of Ireland, who joined NATO in 2027, just before the war. The Great British War resulted in a reputation hit on the United States of America, who confirmed their aggressive approach to any percieved threat. and would ultimately led to the Euro-American split in the 2030's.

Before 2024
In our timeline, the United Kingdom is an American ally, and separtist movements has been on the rise. The Nation is also adapting to life post-Brexit, and is one of the few nations who is already recovering from the Pandemic by mid-2021. In this timeline, our divergence point occurs in 2022. As resentment against the United States of America grew more and more by the day, the British Nationalist Party, or BNP for short, was founded by Nigel Farage, who wanted a fully independent United Kingdom, as he saw every move Britain is doing is just turning itself into an American puppet, like what the European Union did in the early 21st Century. The party began recieving new members left and right, and by 2023, Farage announced his future plans for his ideal Britain: He will pull Britain out of NATO, and unify the British Isles. This concerned sitting US President Joe Biden, who is worried that America could lose grip over one of their best allies. In 2024, the General Election was held, and to everyone's shock, the BNP won the majority of the seats, and Farage becomes Prime Minister.

2024-2027: The Buildup to War
Not long after Farage becomes Prime Minister, he immediately began the process of pulling Britain out of NATO. National Conscription was introduced in 2025, and dissent against the BNP was not tolerated. The Irish Republican Army also began to be purged, and most of it's fighters were either arrested or killed by 2026. All of these actions led to many nations considering Britain to be going down the path of Russia when Vladimir Putin took charge in 2000. Britain's navy was also massively increased to protect the British Isles. In November 2026, Britain offically left NATO, to the shock of many, and Anglo-American relations became strained. The UK was also renamed to the Britannia Federation, as Britannia sounded more patriotic than the United Kingdom. In December 2027, Ireland joins the NATO, after the nation noticed an increased presence of British Troops at their border.

January-March 2028: The Ultimatium
On January 18th, 2028, the Britannia Federation accused Ireland of persecuting English people within Ireland, which Ireland denied. The United States responded two days later, threating Britain with actual invasion should it refuses to back down in Ireland. Britain refused, and on Feburary 29th, 2028, the BF officially gave Ireland a 3-day ultimatium to back down their army and stop their persecution of English people within Ireland, or face invasion. American President Kamala Harris threatened Britain that if they attack Ireland, the whole of NATO will intervene as well, as their doctrine is "An attack on one is an attack on all". Ireland refused their ultimatium, and after that, Britain mobilizes it's army, and prepared for war against the Irish. Duuring this time, the Americans secretly moved over 400,000 troops to Ireland, as well as 3 aircraft carriers.

March 11th - May 2nd: Initial Advances
A week after the ultimatium was ignored by Ireland, the Britannia Federation officially declared war against the Republic of Ireland, as the HMS Darling and the HMS St Albans fired on Dublin. 450,000 troops then marched into Ireland, with a further 1,000 tanks steering into Dundalk and Dublin. It was followed by the RAF bombing civilian targets in Cork, Dublin and Limerick on the same day. The next day, The United States and the rest of NATO declared war on the Britannia Federation, as they have attacked a NATO member.

The Irish, realizing that they stood no chance against the British, decided to abandon Dundalk, which is close to the British border. The Irish kept retreating until the Americans made their first attempted counter-offensive at Drogheda. The attack failed however, and the British continued their advance into Ireland. However, by April 19th, the French and the Germans have all deployed their troops and delievered tanks to Ireland, with the American Navy sinking many British submarines and frigates. The British were held off at the town of Swords, just 10km outside of Dublin. Meanwhile, the British had little issues marching across the middle of Ireland until they reached Athlone, where the 3rd American Regiment and the 4th Irish Division were able to hold them off before they were able to cut the M6 Motorway, connecting Dublin to Galway. In the western part, the British Army failed to advance further inland due to the mountainous terrain, and were stopped at the approaches to Silgo.

May 3rd - July 21st: NATO Counter-attack
With NATO Troops and the American Navy pouring into Ireland, an intense 10-day long battle took place in Dublin and Swords, which the British failed to fully conquer. The Port of Dublin was heavily bombed during the Battle of Dublin, and many major cities were bombed to rubble by the RAF. Despite this, the Irish won the Battle, with over 200,000 deaths combined. With most of it's invasion force weakened, the British attempted to retreat back to Drogheda, but the German Leopold II tanks outran them, cutting off the retreating army using the N52 road. Over 70,000 British Troops are surronded, with only half of them successfully retreating back to Northern Ireland using helicopters and ships, while the remaining 35,000 became Prisoners of War. The British spearhead at Athlone was also blunted, with most of the 60,000 strong army and tanks being able to withdraw by May 25th. With the invasion forces weakened by a third, and with America's Navy and Air Force slowly tipping the superiority towards them, the NATO commanders began to consider where to invade Great Britain itself.

On June 1st, 70,000 American, German and Irish soldiers faced off 90,000 British soldiers at Dundalk, in what would become the bloodiest week of the war by far. From street corner to street corner, from building to building, the British are lurking to destroy the colitation. The battle lasted for over a month in this small town, killing over 40,000 people, including civilians. In the end however, NATO were able to liberate Dundalk, and dealt a heavy blow to the British Army. The German Leopold Tanks were also able to connect with the American army, and within a week, the coliation had reached Lisburn, just outside of Belfast.

July 21st - August 7th: Battle for Belfast & Preparation for Operation Sander
The Battle of Belfast beegan on July 21st, 2028, with the 12th Armoured Infantry Brigade and the 4th Infantry Brigade for Britain against the 7th Infantry Division for the United States and the 37th Panzergrenadier Brigade for Germany. The attack began with the 363rd Panzer Battalion driving into Lisburn, the city just outside of Belfast, before the 3rd Infantry regiment launched an attack on the right side of their flank. The 20th and 23rd Infantry regiment soon followed, and by July 24th, the US Army are dangerously close to cutting half of Northern Ireland off. Next, the 17th Field Artillery regiment fired on Belfast itself, killing many of it's soldiers and civilians.

Later on, on July 27th, an attack began on Belfast itself, with both of the brigades invading the city. The 391st Panzergreandier Battalion first entered the city with the 363rd, before the 161st Division flanked the left side of Belfast as well. Urban fighting was bloody, as thousands of people died in the midst of the tank wreckages, grenades and even city landmines. However, the British were unable to repel multiple attacks from three sides, and by August 3rd, most of the division have been eliminated. As a result, the American, German and French generals all agreed to invade Britain on August 8th, codenamed "Operation Sander".

The plan called for almost 200,000 men, as well as over 2,000 Panzers to land on the beaches of North Devon, and basically cut Cornwall off from the rest of Britain. They then will capture Exeter, Plymouth and Bristol as quickly as possible, before advancing onto Wales and London. The reason why they chose North Devon to land is simple: The others are horrible options. Outright landing anywhere on the South Coast would be suicidal, as Britain has built massive fortifications there. Angilla is also too close to London, and therefore resistance will be easy to arrive. Liverpool-Manchester region would be guareenteed death, while North Cornwall was deemed to be too far away from any major city. They did consider Wales, but in the end, It was determined that Devon would provide a better advantage to logistics than Wales. At around 12am British time on August 8th, an airbourne division landed on Lundy Island, and captured it in 10 minutes, after the tiny garrison on the island surrendered.

August 8th - Operation Sander
At around 0300 hours, the famed 101st Airbourne Squadron landed in the towns of Braunton, Fremington and Westleigh, with the hope of severing North Devon's road connections. The squardron were successful, and the Bideford Peninsula was cut off from the region's main town, barnstaple by 0400 hours. Intense street to street combat also occured in Braunton, as well as Fremington. Then, at 0500 hours, the invasion started, with the 1st, 2nd, 3rd and 10th United States Infantry Divisions, accompanied by the 21st Panzer Brigade and the 7th Armoured French Brigade, landed on the beaches of North Devon. They were spreaded out onto 4 beaches along the coastline: Westward Ho! Beach (and no, that isn't a typo), Saunton Sands Beach, Croyde Beach and Woolacombe Beach.

The 1st US Infantry Division landed on Saunton Sands Beach with the 230th Panzer Batallion, and faced an army of 5,000 men from the 1st Armoured Infantry Division, who was one of 3 divisions in the area. The fighting was intense, with the nearby RAF Airbase dealing heavy casulties on the frontlines. However, despite all these efforts, the American-German force were able to breach the beachhead by 0900, and began an offensive into Braunton. By the end of the day, the landing forces at Saunton linked up with the paratroopers at Braunton, and began to clear out the town.

The 2nd US Infantry Division landed in Woolacombe, with the objective of capturing Illfracombe and Lynton. They faced lesser resistance than the Saunton Sands attack, and by 0700, captured the town of Woolacombe. The divisions then attempted to capture Illfracombe, but were only able to gain control of the lands west of Illfracombe by sunset, and as a result, they halted their advance to allow armoured divisions to land at Britain. The attack on Croyde Beach was much less successful however, and the 3rd Division failed to link up with Woolacombe's Beachead.

The 10th US Infantry Division, along with the 7th French Armoured Brigade landed at Westward Ho! Beach at around 0600 hours. However, the French armoured units couldn't move further inland for a while, as the NATO Commanders failed to realize that there's a massive ridge at the end of Westward Ho's beach. However, by midnoon, the beachead was breached, and the armoured united swooped through the Bideford Peninsula, and cut off the town of Appledore from the rest of the Peninsula. By the end of the day however, the troops failed to capture either Westward Ho! or Bideford, or even linking up with the paratroopers at Westleigh.

August 9th-16th: Fall of Belfast, Advances in North Devon
Over the course of the next week, serval smaller but important advances were made across North Devon and Northern Ireland. Braunton was captured after 2 days of fighting, as well as the RAF Airbase nearby, after a hard afternoon of tank fighting on August 11th. The week ended with the 1st US Infantry Division and the 230th Panzer Battalion approaching the regional town of Barnstaple, with them now joined by the 29th US Infantry Division and the 212th Panzergrenadier Battalion. Further north saw the 2nd and the 3rd US Army Division linked up on day 2, and the two divisions advanced further into North Devon. However, they failed to capture Illfracombe, as a British Regiment refused to surrender in the area. As a result, they sieged the town instead.