The Republic of the Rio Grande had a brief and tenuous existence (1838–1840) before most of it was reabsorbed by Mexico and the remainder annexed by the United States, yet this region that straddles the Rio Grande has retained its distinctive cultural identity to the present day. Born on one side of the Rio Grande and raised on the other, Beatriz de la Garza is a product of this region. Her birthplace and its people are the subjects of this work, which fuses family memoir and borderlands history.

From the Republic of the Rio Grande brings new insights and information to the study of transnational cultures by drawing from family papers supplemented by other original sources, local chronicles, and scholarly works. De la Garza has fashioned a history of this area from the perspective of individuals involved in the events recounted. The book is composed of nine sections spanning some two hundred years, beginning in the mid-1700s. Each section covers not only a chronological period but also a particular theme relating to the history of the region. De la Garza takes a personal approach, opening most sections with an individual observation or experience that leads to the central motif, whether this is the shared identity of the inhabitants, their pride in their biculturalism and bilingualism, or their deep attachment to the land of their ancestors.

"Esto no es cosa de armas" (this is not a matter for weapons). These were the last words of Don Francisco Gutiérrez before Alonzo W. Allee shot and killed him and his son, Manuel Gutiérrez. What began as a simple dispute over Allee's unauthorized tenancy on a Gutiérrez family ranch near Laredo, Texas, led not only to the slaying of these two prominent Mexican landowners but also to a blatant miscarriage of justice.

In this engrossing account of the 1912 crime and the subsequent trial of Allee, Beatriz de la Garza delves into the political, ethnic, and cultural worlds of the Texas-Mexico border to expose the tensions between the Anglo minority and the Mexican majority that propelled the killings and their aftermath. Drawing on original sources, she uncovers how influential Anglos financed a first-class legal team for Allee's defense and also discusses how Anglo-owned newspapers helped shape public opinion in Allee's favor. In telling the story of this long-ago crime and its tragic results, de la Garza sheds new light on the interethnic struggles that defined life on the border a century ago, on the mystique of the Texas Rangers (Allee was said to be a Ranger), and on the legal framework that once institutionalized violence and lawlessness in Texas.