Abandonment War

Abandonment War (廃棄戦争 Haiki Sensō, lit "Abandoned War"), known as Waste War by Yen Press and Funimation's official English translation, is a world war happened in 300 years ago. The war was happened due to lack of resources the Earth have now, in order to use all the resources, the humanity must be reduced as much as possible.

History
According to the legend, the war was keep going for a long time that it almost devastated humanity. Until the Legendary Red Baron went to ends the war with their superhuman powers. After the war had ended, the Red Barons disappeared from the world, never to be seen again.

It's later revealed that the Abandoment War was originally promised to happened in one years later, but due to United Nation Forces secretly uses Ballots to approved the war begin earlier and allowed the uses of nuclear weapons, the war was started in half years instead.

In the first day of the war started, United Nation Forces made a surprise attacks on 13th Special Military Forces School and begin their invasion in Japan. The United Nation Forces attacked the school was to finds the remaining Ballots.

Aftermath
After the war had ended, Althea and Abyss was created and the calendar named after Althea. Licht suffering from despair for over 300 years due to Althea's creation and he "killed" his brother, Nana has awaken from her long sleep and left Special Service together with Licht.

While Althea can live peacefully, people from Abyss and other countries (Such as Russia) is still suffering from the lack of resources and fighting each other. Due to Althea's exist, most of the resources available on the land will be forced to transfer to Althea.

In Abyss, Tokikaze becomes the King of Abyss and ruling the country for over 300 years. Along with villages, Class A students committed suicide so that the children of Abyss have a enough foods to eat.

Participants

 * Licht Bach
 * Sakai Tokikaze
 * Douan Taketora
 * Sonohara Mizuka
 * Gespenst Zerlegen
 * Alexandroff Grigorovich
 * Shumerman Bach
 * Firenda
 * Ichinose Saki
 * Akui Genji
 * Suda
 * Kyouka
 * Asumi
 * United Nations Force Sergeant

Trivia

 * It's not known when was the war take placed. Though according to Chapter 24, the war is take placed at October 1, 20XX.