Chuck Debus is a trailblazing coach whose vision for American athletics became a mission far greater than sport. Over his career, he placed 177 athletes—many of them women previously denied opportunity—on U.S. and Olympic teams, breaking barriers at a time when few dared to try. His story, at the heart of Allegiance, is one of Cold War conviction, personal redemption, and the belief that one individual’s fight for equality can shift the course of history.