Foreword by Roderick M. Cox: In 1979, the Combat Studies Institute published the first of the Leavenworth Papers. The series afforded the CGSC Faculty the opportunity to present their scholarship to the professional military community seeking to learn about contemporary and doctrinal issues from historical events. After an eight year hiatus I am excited to bring back the Leavenworth Papers series to once again contribute to our Army's education and leader development. That first publication of the Leavenworth Papers examined the evolution of US Army tactical doctrine since World War II. The research offered historical insights to senior leaders and doctrine writers charged with refocusing the Army toward a possible conventional conflict with Warsaw Pact military forces. In the 25 years that followed, the Leavenworth Papers series grew to include 22 studies that addressed historical cases that were likewise of tactical, doctrinal, and organizational interest to the Army. The subjects of these studies varied but the authors were intent on making history relevant to military professionals engaged in thinking about current and future challenges. This latest publication of the Leavenworth Papers marks the continuation of this storied series. Third War offers a lucid and well-researched analysis of irregular warfare during the American Civil War. Dr. Martin's focus on insurgent operations in the western border region brings fresh insights to this area of study. Moreover, the history of insurgency in these western states offers a greater understanding of irregular warfare to those who may be tasked with mounting counterinsurgency operations in the not so distant future. CSI - The Past is Prologue!

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