The Texas Ranger law enforcement agency features so prominently in Texan and Wild West folklore that its accomplishments have been featured in everything from pulp novels to popular television. After a brief overview of the Texas Rangers' formation, this book provides an exhaustive account of every known Ranger unit from 1823 to present. Each chapter provides a brief contextual explanation of the time period covered and features entries on each unit's commanders, periods of service, activities, and supervising authorities. Appendices include an account of the Rangers' battle record, a history of the illustrious badge, documents relating to the Rangers, and lists of Rangers who have died in service, been inducted into the Texas Ranger Hall of Fame, or received the Texas Department of Public Safety's Medal of Valor.