An elite soldier. A new armored weapon. The invading aliens have finally met their match.

First Lieutenant Mike Sandhurst led an elite infantry platoon on a rescue mission to Tycho-3. Wearing state-of-the-art ATLAS powered armor, Sandhurst's unit faced down a relentless, wasp-like enemy who tore through them and left Sandhurst for dead.

Rescued by ground forces, Sandhurst gets reassigned as humanity races to war against aliens they call Buzzers.

To fight the Buzzers, humanity turns to the modernized Centurion main battle-tank. Sandhurst must quickly learn the lexicon of "shoot, move, communicate" and lead his fast, self-sustained, and very lethal armored forces.

When the Buzzers appear again to threaten colonized worlds, Sandhurst's regiment moves forward to hold the planet Heske by force. But they aren't alone. The orbital carrier Yorktown and its space-capable wing dominate the skies while tanks take the fight and put Steel on Target.