In 1861, as the United States tore itself apart, the Confederacy set its sights on an empire beyond the battlefield, one built not with cannons, but with signatures. To win it, Richmond sent two men who should never have worked together: Albert Pike, a poet-lawyer turned diplomat with a talent for persuasion, and Benjamin McCulloch, a frontier legend who'd survived the Alamo's shadow, ridden with the Texas Rangers, and fought his way through two wars. Their mission: convince the Five Civilized Tribes to abandon the United States and bind their fate to the South forever.

What followed was a story of desperate diplomacy, broken promises, and battlefield catastrophe, treaties signed under drought and fear, soldiers marched beyond the borders they'd been promised they'd never leave, and an alliance that collapsed in the smoke of Pea Ridge, taking McCulloch's life and Pike's career with it. Left behind were the Five Tribes themselves: betrayed twice over, first by the nation that expelled them, then by the one that swore to protect them, and forced, in the war's brutal aftermath, to pay for a gamble they never should have had to make.

The Confederacy's Secret Weapon is a gripping, meticulously researched account of ambition, alliance, and abandonment on America's forgotten frontier, a story of empire-building that reveals just how far the Confederacy was willing to go, and how little it was willing to deliver.