Winner of the 2019 Brigadier General James L. Collins Jr. Prize, awarded by the U.S. Commission on Military History for the best book on military history published in 2017 or 2018. The awarding committee praised the volume as ‘a genuinely original scholarly contribution... comprehensive, balanced, and insightful... this 600-page magnum opus will significantly enhance our understanding of military history during a seminal period of human development.’"This is an immensely thorough and detailed study of the battle of Najera. The event itself is often dismissed by modern writers as an exotic adventure by the Black Prince, a mere adjunct, and a futile one, to the ‘real substance’ of the ‘Hundred Years War’ which remains such a focus for historians, and especially those interested in military development. But this book is much more than simple ‘metal-bashing’ […] In this valuable analysis of the battle of Najera, its causes and consequences, the authors discuss topics of wide general interest to military historians, notably the problems of logistics and the desirability (or otherwise) of battle. The great virtue of the account is that it is built upon the sources which are discussed and evaluated throughout. But its greatest value undoubtedly lies in the translations of sources in the appendices. This is an important book based on solid and careful scholarship". John France, in De Re Militari April 2019.