Book excerpt: This book is a catalog of a traveling museum exhibit titled "War and Peace on the Rio Grande 1861-1867" which first debuted in February of 2019 at the University of Texas Rio Grande Valley. In an effort to foster ongoing history education and public awareness of the Rio Grande Valley region of Texas's history, this exhibit and catalog guide are designed to highlight several aspects of US Civil War events, people, places and battles that occurred in deep, south Texas along the newly established international border with Mexico during the war and with Reconstruction activity immediately afterward. In a region that is largely ignored with regard to the US Civil War activity, this book and its corresponding exhibit will show just how important the region was in maintaining war efforts which continued even after the surrender of Robert E. Lee to Ulysses S. Grant in April of 1865.