The Great War

 The Great War refers to an intense war that took place in Europe, the stronghold of powerful ability users, namely the Transcendentals and Agatha Christie's Order of the Clock Tower. It took place 14 years ago and expanded influence through countries outside of Europe.

Warring parties later agreed to a ceasefire, but Mimic, one of the war's participants, received falsified orders from their own country to attack a walled city. This attack violated the ceasefire, resulting in Mimic's expulsion from their homeland, later by the Order of the Clock Tower. At the end of the Great War, France, Germany, and England signed the peace treaty and created Standard Island as a symbol of peace.

The Hunting Dogs project is suspected to take place after the war.

Involved Parties

 * Japan
 * France (Mimic )
 * England
 * Germany

Trivia

 * As of the latest chapter of the manga, it is implied that Japan participated in the war. The war itself might not only happened in Europe but almost all over the world.
 * Akiko Yosano and Ōgai Mori  Mori  participated in the war by joining the Japanese Military.
 * The war is the cause of the surging numbers of orphans.