Author's Note: This uses a common thread I use in my stories where the technology level of Naruto is important to the story, in that the Ten Tailed Beast actually came twice before the time of Naruto, the first time bringing a near-future version of a parallel Earth to near-extinction, the period between then and the age of the Elemental Nations being where Kaguya foolishly unleashed Datara a second time. The 'Dark Ages' mentioned often refer to what would be... well, Now.
Tenten looked at the broken down massive projectile weapon she'd been working on. Part of what was known as 'Dark Ages Technology', it ranged from mystifying items that caused horrific and toxic disease to the technology that mass produced clothing and weaponry. Another name for it, used originally by the people of Uzushiogakure, was 'High Technology'.
Uzu had managed to restore knowledge of this technology to many fields in their history, only for the lands which had been Uzu to, one day, be contaminated by s