Go Tell The Spartans by Jerry Pournell and S.M. Stirling

Stranger, go and tell the Spartans
That we lie here, obedient to their commands.

Since the late 20th century, the Soviet-American CoDominium had kept the peace, both on Earth and among the stars. But now the CoDominium is dying, and its death-throes will be terrible; already the nations arm for their final battle. With Earth doomed, mankind's sole hope for a future worth having rests on a planet called Sparta, a planet where American idealists have raised once more the banner of a liberty that has been forgotten amid the corruptions and tyrannies of Earth.

The Spartans know that they must be strong to survive; that is why they hired John Christian Falkenberg and his Legion to train them. What the Spartans do not know is that Falkenberg's enemies have become their own—that Grand Senator Bronson's techno-ninja will follow the Legion to Sparta, and there wreak a terrible vengeance aimed at ending the Spartan experiment before it has fairly begun . . .

At the publisher's request, this title is sold without DRM (Digital Rights Management).