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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.
- France (Mimic )
- 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.