For over two thousand years, the Sima Fa—also known as The Methods of the Sima—has stood as one of the foundational texts of ancient Chinese military philosophy. Yet unlike The Art of War or the Six Secret Teachings, the Sima Fa survives only in fragments. Most of its original scrolls are lost, its chapters scattered through history, its structure incomplete. What remains hints at a profound system of governance, discipline, logistics, and strategic insight—but leaves modern readers with a text full of gaps. The Long Lost Scrolls of the Sima Fa: A Scholarly Reconstruction of the Missing Chapters offers a deeply researched attempt to bridge those gaps. Drawing on archaeological findings, cross-textual analysis, surviving Warring States doctrine, and the internal logic of the extant scrolls, this work reconstructs what the missing material most likely contained. It does not claim to restore the original text, but instead presents a reasoned portrait of what the lost chapters would have addressed—ranging from mobilisation and battlefield formations to post-conquest governance, logistics, intelligence, diplomacy, and the moral responsibilities of command. This book is written for readers who value classical strategy, ancient statecraft, and the intellectual world of early Chinese military thought. Each chapter is presented in clear, modern language and accompanied by contextual explanations that show why these reconstructions are plausible and how they align with the values expressed in the surviving Sima Fa. Rather than speculation for its own sake, this volume offers a disciplined, evidence-guided exploration of a lost tradition. Whether you are a scholar of ancient warfare, a strategist seeking timeless principles, or a reader fascinated by early political philosophy, this reconstruction provides a rare and compelling window into what the Sima Fa may once have been—a comprehensive blueprint for the organisation, conduct, and ethical foundation of war.