Knights of "Sidonia". Volume 1

A thousand years ago, the land was destroyed by Ras Gauna - giant almost invulnerable aliens. "Sidonia" is one of the interstellar ships of the city, on which surviving people wander through space and look for a new house. At the same time, residents of Sidonia have to fight off Gaun’s attacks - special robots and guards have been created for this.
Nagate Tanikaze grew at abandoned lower levels of "Sidonia". By accidentally being upstairs, he was discovered by the military, who noticed a talent in managing combat mechanisms in a young man and appointed him piloting the Tsugumori, a guard of the old model. Now Nagate and his fellow pilots will survive in an almost hopeless war against Gaun