In Great Commanders of Modern Times and The Campaign of 1815, William O'Connor Morris joins biographical military criticism to a close study of Napoleon's final campaign. The volume surveys major captains of the modern era while culminating in an exacting reconstruction of 1815, where strategy, command temperament, staff work, and the contingencies of battle are weighed with disciplined judgment. Its style is lucid, analytical, and unmistakably Victorian, combining narrative vigor with reflective assessment. Situated within the late nineteenth-century tradition of military history, the book seeks not merely to recount events but to derive principles of leadership, responsibility, and operational art. Morris was a distinguished Anglo-Irish historian, legal official, and public intellectual whose training in administration and law sharpened his sense of evidence and institutional decision-making. Known for works on French history and European politics, he wrote with a broad continental perspective, and his sustained interest in Napoleon and the settlement of Europe naturally informed this study. His historical method reflects both archival seriousness and the era's concern with character as a force in history. This book is especially rewarding for readers of Napoleonic studies, military leadership, and nineteenth-century historiography. It offers both an engaging narrative and a thoughtful meditation on command under pressure.