This manual, Army Techniques Publication ATP 3-13.1 The Conduct of Information Operations October 2018, provides guidance on conducting information operations (IO) at tactical through strategic echelons and across operational phases. It is primarily intended for IO officers and planners or those assigned responsibilities for fulfilling IO duties. Secondarily, it is a useful primer for commanders, operations officers, intelligence officers, and other staff members who oversee, coordinate, or support IO planning, preparation, execution, and assessment. The principal audience for ATP 3-13.1 is all members of the Army Profession. Commanders and staffs of Army headquarters serving as joint task force or multinational headquarters should also refer to applicable joint or multinational doctrine concerning the range of military operations and joint or multinational forces. Trainers and educators throughout the Army will also use this publication. This manual provides Army leaders and information operations (IO) professionals with essential information necessary to integrate IO effectively into their unit's operation. It guides leaders to synchronize information-related capabilities (IRCs)-such as military information support operations, cyberspace electromagnetic activities, military deception, and operations security-to achieve effects in and through the information environment that support the commander's intent and concept of operations. The techniques discussed are deemed a way to conduct IO, not the way. Army professionals tailor the processes, tools, and techniques of IO to suit the mission, situation, and requirements of their commanders. ATP 3-13.1 contains seven chapters and one appendix. The following is a brief description of each: Chapter 1 provides an overview of the conduct of information operations. It discusses methods by which staffs at company through corps and above affect the information environment to a decisive advantage but with differing levels of expertise, supporting capabilities, and authorities. The chapter reviews a range of characteristics that distinguish the conduct of IO at higher versus lower levels. Chapter 2 provides a technique for analyzing, understanding, and visualizing the information environment. Because IO largely concerns creating effects in this environment, it is essential to understand it in all its complexity. Chapter 3 discusses determining the IRCs available to a unit and methods to request other capabilities, if required. The chapter also provides a brief synopsis of the various IRCs that commanders and staffs synchronize to create effects in the information environment. Chapters 4 examines techniques for integrating and synchronizing information-related capabilities. It begins by discussing commanders' responsibilities and transitions to discussing staffs' responsibilities. It also provides samples of a range of tools and products commonly employed by commanders and staffs to ensure the right effects are generated at the right place and time. Chapter 5 discusses intelligence support to IO, which is essential to its conduct. It also provides an overview of the ways that IO is integrated into the targeting process. Chapter 6 overviews assessment, starting with its framework and then discussing its focus, types, and components. It provides techniques for developing IO objectives, measures of performance, measures of effectiveness, and indicators, as well as for presenting assessment results to the commander. Chapter 7 examines the conduct of IO across operational phases and how these phases align with joint phasing. Appendix A provides an overview of IO in garrison and available joint and Army IO-related training.