Gargantia on the Verdurous Planet 2013

While fighting an intense inter-galactic war, a mecha pilot is accidentally warped into a space-time neither he nor his computer recognize. After waking up from a long-time hibernation, he finds himself trapped on a planet, with human residents talking in an unknown form of language, using inferior technologies, and – most shocking to him – naturally breathable air. 2013 Gargantia on the Verdurous Planet 翠星のガルガンティア