Eagle in the Snow (ISBN 1-59071-011-8) is a 1970 historical fiction novel written by Wallace Breem, which was reprinted in 2003 following the success of the film Gladiator.
After being promoted to 'General of the West' and his wife's death, Maximus is sent to Moguntiacum (modern-day Mainz in Germany) where he is assigned to defend the entire 820-mile border between Gaul and Germania with just one legion, the XX.
Realising the near impossible task, Maximus decides that he and his legion of 6,000 men can succeed by laying out a series of military forts along the west bank of the Rhine to prevent six Germanic nations – 250,000 people – from invading Gaul.
As Maximus carries out his duties on the border, he battles against a corrupt bureaucracy in the Roman Empire that denies every request he makes that could assist his Rhine campaign.
He also, under the growing pressures from his allies—including his former enemies— who want him to seize the Western Emperorship for himself, finds himself fighting for a dying empire against Christianity that condemns his traditional pagan beliefs.