The God Mars Book One: CROATOAN

The God Mars is a pulp-style science fiction series set on a partially-terraformed Mars a half-century after a nuclear disaster cuts thousands of colonists off from Earth. Left for dead with few resources, the isolated groups of survivors develop their own unique cultures at different levels of technology, ranging from the primitive to the frighteningly advanced. And all fear the return of their home planet, because they believe that Earth intentionally tried to annihilate them, and will do so again.

In Book One, a mixed group of military personnel and civilians awaken after fifty years in chemical hibernation, and try to unravel the mystery of why no rescue has come for them. Attempts to re-establish contact with Earth fail, and they begin to encounter the descendents of other survivors, radically changed after generations on their own.