Hunter Patrol - H. Beam Piper and John J. McGuire

In a future ruled by an oppressive government, Major Allan Hartley begins to suspect that history itself has been altered to maintain control. During a mission with his hunter patrol, he experiences strange memories of another past—one where freedom and truth once existed. As Hartley uncovers evidence of time manipulation, he must choose between loyalty to his superiors and the fight to restore reality. The story explores the tension between duty and conscience in a world built on rewritten history.