The One Week War

The One Week War「一週間戦争」or The Three Front War「三正面戦争」(referred to as The Five Day War in the web novel) was the conflict between the Elfrieden Kingdom, the Principality of Amidonia and the Three Dukes. This would be the first military action performed by the newly-instated ruler of Elfrieden, Kazuya Souma. The outcome of this conflict was the disbandment of the Army, Air Force and Navy of the Three Dukes, the formation of a combined Armed Forces Military, the annexation of Amidonia, and the formation of the Kingdom of Friedonia. The war officially begin from "32nd Day, 9th Month, 1546 Year of Continental Calendar" and ends on the 5th day of next month.

Prelude

Souma issues Final Ultimatum to the three dukes

• Principality of Amidonia offers assistance to both Elfrieden and the Three Dukes, with the hidden agenda of regaining territory lost in the war with Elfrieden 50 years ago.
• Kazuya Souma dismisses the services of the Mercenary State of Zem and holds a Final Counsel with the Three Dukes to determine their allegiance and discuss his plan to create a combined Armed Forces Military.
• Excel Walter, leader of the Navy, pledges her loyalty to Elfrieden.
• Castor Vargas, leader of the Air Force, and Georg Carmine, leader of the Army, openly rebel.
• Upon hearing of the rebellion, Gaius Amidonia and Julius Amidonia lead their army of 30,000 over the Ursula Mountains and into Elfrieden territory towards the fortress of Altomura. Unknown to them, Excel was already stationed at the fortress during the time of the Final Counsel and had sworn her allegiance to Kazuya days ago.
• Before the Amidonian Army reaches Altomura, Kazyua sends out a request for all adventurers to evacuate the nearby villages in the army's path. It is under the pretense of protecting the villagers from the Flame Pierrots. Unknown to all, they are merely dolls being controlled by Kazuya. The dolls also delay the Amidonian army in its march.

Day 1

• The Amidonia Army lays siege to the Fortress of Altomura, but are unable to attack due to the stalling tactics employed by the defenders. As a result, the invaders are held back until Day 2.
• Elfriden Forces are sent to Georg Carmine's Duchy to put down his rebellion and the corrupt nobles he is sheltering. A temporary fortress is built as the Elfrieden Forces' base.
  • The day is a sequence of small skirmishes and confrontations. Neither side gains an advantage
  • Carmine's side loses 3 large cannons due to the impatience and ineptitude of the corrupt nobles. Mercenary soldiers also prove to be unreliable.
  • Unknown to the corrupt nobles, it is Georg Carmine's plan to intentionally lose the battle.
• Red Dragon Castle is attacked by the Battleship Albert, used as mobile artillery.
  • Carla Vargas leads the Air Force Wyverns to assault the Albert and capture Kazuya Souma.
    • The Battleship assault is later revealed to be a diversion to lead Carla away from Red Dragon Castle and leave Castor vulnerable.
• Castor Vargas is defeated and captured by a strike force led by Souma.
  • Carla is also taken prisoner and the Air Force is now under Souma's command.

Day 2

• Using the Air Force now under Souma's command, the Elfrieden Forces launch an air assult on Carmine Duchy.
  • Georg Carmine, defenseless against air assaults, surrenders. All corrupt nobles are taken prisoner and later executed.
• With the two rebelling Dukes now defeated, Kazuya announces his intent to invade Amidonia and capture the city of Van.
  • Upon hearing of the imminent invasion of their home country, the Amidonia Army abandons its siege of Altomura and begins a withdrawal.
  • Due to the muddy terrain on the return and an ambush a commando group led by Juna Doma, the Adominia Army is cut down to 15,000.

Days 3 and 4

• The Amidonia Army is delayed further on their march to Van, as they encounter disease, food and water shortages and desertion.
  • They resort to conscripting peasants to rebuild their ranks back up to 25,000.

Day 5

Gaius trying to kill Kazuya Souma

• The Amidonia Army finally reaches the outskirts of Van, only to find that the Elfrieden forces are already there.
  • The enemy is well-rested and ready, while the Amidonians are tired, hungry and desperate.
  • The Elfriedens number 50,000 while the Amidorians number 25,000.
• Though the Amidonia Army puts up a fight, defeat eventually becomes inevitable.
  • Gaius is killed during a suicidal charge in an attempt to kill Souma.
  • Julius manages to escape, but cannot muster enough forces to re-take Van.

Aftermath

• Van is annexed by Elfrieden Kingdom.
  • During its occupation, its citizens enjoy the food aid, entertainment and freedoms granted by the occupiers.
  • The Gran Chaos Empire is forced to intervene and invoke the First Clause of the Mankind Declaration Treaty, as the border of one of its signatory state had changed.
  • After lengthy negotiations, Van is returned to Amidonia, though the country is now forced to paying reparations for its invasion of Elfrieden.
• The rebel generals and corrput nobles are put to trials.
  • Georg Carmine is imprisoned, pending trial and ultimately execution for leading treason.
    • King Kazuya Souma privately visits him in prison, and offers Georg the right to quietly commit suicide instead of facing public trial. Georg accepts the offer and drinks the poision Souma provided.
    • Beowulf Gardner and Georg's subordinates were submitted and joins King Souma's army.
    • The Black Cats were formed.
      • It is suggested that Georg Carmine's death is staged, that he is in fact alive and masked under the Black Cats.
  • Castor Vargas is spared the death penalty for his long service to the kingdom. Instead, he is stripped of all titles and his family name "Vargas", is forbidden from contacting his territory and family, and is placed under the command of his Mother-In-Law, Excel.
    • Carla Vargas is also spared, and is made a slave under Kazuya Souma.
    • King Souma held court to determine the neutral-appearing nobles' true allegiances. After evaluation, Owen Jabana and Piltory Saracen are dismissed from the scene, and the remaining nobles are swiftly eliminated.
  • The nobles gathered at Randel were quickly rounded up and executed.
• One month after the return of Van, Julius attempts to erase the enfluence of Elfrieden on the people of Amidonia . The Amidonian Rebellions took place in response to the prince's oppression, creating uprising throughout the nation.
  • Julius moved northwest to quell one of the revolts.
  • While Julius was away from Van, the citizens in the city revolted and openly declares to pledge for Elfrieden.
• The Amidonian Army cannot handle the numerous rebellions and is weakened even further due to the high rate of desertions.
  • Julius is forced into exile and flees to the Union of Eastern Nations as a refugee.
• During this period of turmoil, both the Republic of Turgis and the Lunaria Orthodox Empire direct their forces toward Amidonia.
  • For the former, it was to gain warmer and more farming areas. It attacks Nelva.
    • The forces of Turgis were stalled by General Herman Neumann and former Finance Minister Gatsby Colbert.
    • The Army of Turgis later withdraws due to the threat of invasion by the naval forces led by Excel Walter.
  • For the latter, it was under the pretense of protecting followers of their faith. It begins to buildup its forces at the northern border, but later ceases its buildup and decides not to confront the Elfrieden forces at Van.
• Elfrienden Kingdom, under he pretext of answering to the people's call, completely annexes Amidonia.
  • The two countries are united and renamed to form Kingdom of Friedonia.
  • The Mankind Declaration Treaty cannot be invoked.

Changes from WN to LN

Some scenes were removed/changed during the novelization of WN.

• During prelude, unknown to Castor, the entire Final Counsel was publicly broadcast to the people of the Vargas Duchy.
• During Day 1, Castor is besieged by the angry citizens of the Vargas Duchy, who resent him for rebelling and denying them the food and economic aid offered by Souma.