This book provides an in-depth historical account of the Rio Grande, one of North America's significant rivers. The narrative is divided into four parts, each representing a different era in the river's history. The author meticulously explores the indigenous cultures that first inhabited its banks, the Spanish conquest, the Mexican-American War, and the modern development of the river. The book is not just about the river itself, but also about the people, cultures, and events that have shaped its course and the region surrounding it.