This fourth and final volume of the Savage Frontier series completes the history of the Texas Rangers and frontier warfare in the Republic of Texas era. During this period of time, fabled Captain John Coffee Hays and his small band of Rangers were often the only government-authorized frontier fighters employed to keep the peace. Author Stephen L. Moore covers the assembly of Texan forces to repel two Mexican incursions during 1842, the Vasquez and Woll invasions. This volume covers the resulting battle at Salado Creek, the defeat of Dawson's men, and a skirmish at Hondo Creek near San Antonio. Texas Rangers also played a role in the ill-fated Somervell and Mier expeditions. By 1844, Captain Hays' Rangers had forever changed the nature of frontier warfare with the use of the Colt five-shooter repeating pistol. This new weapon allowed his men to remain on horseback and keep up a continuous and deadly fire in the face of overwhelming odds, especially at Walker's Creek. Through extensive use of primary military documents and first-person accounts, Moore sets the record straight on some of Jack Hays' lesser-known Comanche encounters. For the exacting historian or genealogist of early Texas, the Savage Frontier series is an indispensable resource on early nineteenth-century Texas frontier warfare.