After their defeat at Hoover Dam, the Legion is getting desperate. A large amount of resources were poured into that attack, and the losses were atrocious. With Lanius and Caesar both gone, there's only one hope left for the Legion: Legate Sustinere. A brash and irritable man, Sustinere is just what the Legion needs. Somebody who's aggressiveness is just as powerful as the Legion's desperation.
In one last attempt to unifie their forces and regroup, the Legion must attempt to take a different pre-war city: Denver. However, with untapped water reserves and pre war weaponry held up in the old city, as well as plenty of tall and relatively undamaged buildings that would let them spot attackers from miles away, the Legion weren't the only ones after the city.
Now, at the peak of their power, the bear has turned its gaze to the horizon, and want the same thing the Legion does.
All the while, a long forgotten force grows ever more powerful, ready to lash out against both armies.