Strait of Dover

The Strait of Dover or Dover Strait (ドーバー海峡) is a strait located at the narrowest part of the English Channel which separates the United Kingdom from continental Europe. The Channel Tunnel operated by Eurotunnel is located directly under the strait.

As the border between two nations with different religious influences, the Anglican Church for the United Kingdom and the Roman Catholic Church for France and much of Europe, the Strait of Dover is the site of several magic side events in the Toaru Majutsu no Index universe.

Princess Villian hostage crisis
10 years prior to the start of the current year of the timeline, Princess Villian in her Traveling Fortress was abducted by the Spanish Astrological Sect near the French side of the Strait of Dover. Due to political complications involving the British Royal Family itself, the Knights of England could only camp at the English side of the strait and watch the French battle the sect. William Orwell, as a mercenary and is not subject to the politics between Britain's major factions, later goes out on his own to save the princess, ending the crisis.

Necessarius Special Admission Test SS
After stealing the Necronomicon from the British Library, Arlands Darkstreet of the magic cabal Dusk Waiting to Awaken performed a ceremony on an ocean salvaging terminal in the strait to summon the sunken city R'lyeh. This is later put to a stop by Amakusa Church Christians in their attempt to clear their name after being framed by the magic cabal.

British Royal Family Arc
The Eurotunnel is attacked by France at the behest of the Roman Catholic Church that is now under the control of Fiamma of the Right. Because of hard evidence that implicates France in the attack, it gives reason for Carissa to threaten France and take control of the country, which would later be known as the British Halloween.

The Strait of Dover is later subject to a confrontation during the coup between France and the United Kingdom. Princess Carissa, dispatches a destroyer equipped with the Bunker Cluster missiles to the strait to threaten France. The French also had a nuclear submarine hidden in the strait with a nuclear missile aimed at London, which Carissa proceeded to sink while speaking to the French president in the aftermath of the Battle of Folkestone.

The submarine-type mobile fortresses, Selkie Aquarium, are also underwater in Dover, and later participate in the opening bombardment of the Battle of Buckingham Palace, along with the Coven Compass. A couple of the Selkie Aquariums also engage the Knights faction and the Royal Navy, though it is unconfirmed if this also occurred in Dover Strait.

World War III Arc
The Strait of Dover was the site of a battle between English forces and invading French forces. The waters of the strait were frozen by the invaders, impeding their enemy's naval capabilities. The arrival of Carissa and the Mobile Fortress Glastonbury helped turn the tide of the battle for the Anglicans, prompting the Maiden of Versailles to take to the battlefield herself.