The author presents a detailed account of military surgery across campaigns in Portugal, Spain, France, and the Netherlands and appends observations from later combat in the Crimea. The work combines case reports, operative techniques, statistical and practical observations, and reflections on organizational improvements, arguing for systematic instruction, better hospital arrangements, and specific operative innovations. Lectures and recorded cases illustrate changing practices, lessons learned in the field, and recommendations for training military surgeons and improving patient outcomes during and after conflicts.