Novayan blockade of Europe and South Liberion

The Novayan blockade of Europe and South Liberion, codename Operation Purgatory, began not long after revelations of the United Kingdom of Britannia, Republic of Gallia and Empire of Karlsland had a hand in leading two technologically-advanced nations into a cold war.
The blockade led to 20 or more Allied warships sunk and 50 or more Allied civilian ships sunk by both the Novayan Air Force and Novayan Navy. Quetzalcoatl, God-Queen of the Aztec Empire, intervened in a battle between the Novayan blockade forces and the Allied-Alliance forces, leading to a confrontation in Morales which saw Grand Marshal Borealis and Duchess Maria confront each other within the Volkshalle.
The blocakde ended only after forcing the Allied Nations, especially Britannia, Gallia and Karlsland, into signing the Unequal, or Unfair, Treaty of Rome.
Although the blockade lasts for a few weeks, the blockade saw for the first time the use of occult weapons technology and paratechnology used by the Novayan Commonwealth to enforce its brutal blockade - one example is the Artemis-class Laser System, which were used on a tower in the middle of a battleship or battlecruiser to fire an electro-thaumic laser which destroys ships, aircraft, vehicles and even people. It also marks the first time the Novayan Commonwealth - or rather, Grand Marshal Borealis, known to be a remnant of Novaya's old hatreds - responds to the three nations' indirect betrayal by hesitantly or reluctantly punishing them disproportionately, leading to the indiscriminate destruction of Allied ships, be they civilian or military.