Soshite Itan no Assembler Gendai Majutsu-shi, Sennen Mae ni Teni Saserare Tanode Aratana Rekishi wo Tsukuru

is the first volume of the Soshite Itan no Assembler light novel series, written by Eichida and Illustrated by Ayami. It was released under the Dengeki Bunko Imprint in January 2019.

Synopsis
On that day, the Sobulm Magic Academy, which teaches cutting-edge magic that Elliott and Ashe attend, suddenly "disappears." Instead, what appeared in front of them were old-fashioned knights wearing familiar magic towers and metal armor. And-the homeland that is about to be destroyed. Yes, they had transferred a thousand years ago. The era was the Magic War period when the three great powers competed for hegemony. It is said that it has the power to destroy the country, and "God beasts" such as the dragon Calibun Cruz, whose existence can only be confirmed in history books, also appear. Can they use the strongest magic to protect their homeland and protect the future they should return to !? A fantasy about history has begun here!

(source: Dengeki Bunko Official Website - Translated)