Freedom Soldiers examines the lives of formerly enslaved men who deserted the US Army during the Civil War and their experiences in army camps, courts, and prisons. It explores their reasons for leaving, often through their own voices from courts-martial testimony.

Despite its relative invisibility to the public, the administration of military justice during the Civil War played a vital role in maintaining the discipline necessary for Union military success. While some scholars have criticized the Union military courts as arbitrary and excessively harsh, others have defended it as a necessary means of maintaining order in the face of unprecedented challenges faced by the Union. Drawing on extensive primary research, this history presents a compelling narrative based on a statistical analysis of 5,000 Union military trials, court records, historical legal publications, and insights from contemporary historians. This work analyzes the relationship between alcohol misuse and misconduct, covers the differing approaches to sexual misconduct across the services, and exposes the uneven and sometimes unfair application of military justice. Offering a balanced perspective on the struggle between maintaining discipline and protecting the legal rights of service members, this history is the first of its kind.

Colonel William Winthrop singularly was the most influential person in developing the military law of the United States. A half century ago, the Supreme Court tendered to Winthrop the title, 'The Blackstone of Military Law,' meaning simply that his influence outshone all others. He has been cited over 20 times by the highest court and well over a 1,000 times by other federal courts, state courts, and legal texts. In this, he surpasses most other legal scholars, save Joseph Story, John Marshall, or Felix Frankfurter. But while biographies of each of these Supreme Court Justices have been written, there has been none to date on Winthrop. The Blackstone of Military Law: Colonel William Winthrop is the first biography on this important figure in military and legal history. Written in both a chronological and thematic format, author Joshua E. Kastenberg begins with Winthrop's legal training, his involvement in abolitionism, his military experiences during the Civil War, and his long tenure as a judge advocate. This biography provides the necessary context to fully appreciate Winthrop's work, its meaning, and its continued relevance.