Military uses in space are rapidly changing and expanding, challenging both states and non-governmental agencies in identifying and applying the governing rules. In the midst of these challenges, states, policymakers, and practitioners must engage with new, real circumstances in space, not merely hypothetical threats or problems. As a contribution to the understudied but crucial field, The Woomera Manual on the International Law of Military Space Activities and Operations is interdisciplinary in nature— drawing on space law, national security law, technology, international law, and diplomacy.Thus, The Woomera Manual serves as the first comprehensive examination of the field. In it, all three phases of military space interactions are analyzed (during times of peace, tension or crisis, and armed conflict), with relevance to both the public and private space sectors. Utilizing meticulous research and focusing particularly on state practice, it explores the interaction of different legal regimes, including space law, the UN Charter, other treaty-based regimes, as well as international humanitarian law. Through an extensive consultation process with state and NGO representatives from across the globe, The Woomera Manual serves as a practical and reliable resource in the emerging field of space law. This book is a critical resource for any entity navigating the increasingly consequential subject of space operations by providing an outline for more predictable and peaceful cooperation.