Soldiers Returned From War 2,000 Years Later. Humanity Had Evolved Into Something Bizarre

Staff Sergeant Nate Hollis returns from a six-week campaign to discover that six centuries have passed without him.

Relativistic deployment has kept Nate and Second Platoon young while humanity has changed around them. The people waiting at the station are smaller, biologically altered, and unable to share air with baseline humans. The only thing that still recognizes Nate without hesitation is the ancient military machinery built to send soldiers back into the war.

So the platoon deploys again. Each transit carries them farther from the civilization they served, and each mission leaves behind...