This manual, Army Doctrine Publication ADP 3-0 Operations July 2019, constitutes the Army's view of how to conduct prompt and sustained operations across multiple domains, and it sets the foundation for developing other principles, tactics, techniques, and procedures detailed in subordinate doctrine publications. It articulates the Army's operational doctrine for unified land operations. ADP 3-0 accounts for the uncertainty of operations and recognizes that a military operation is a human undertaking. Additionally, this publication is the foundation for training and Army education system curricula related to unified land operations.The principal audience for ADP 3-0 is all members of the profession of arms. Commanders and staffs of Army headquarters serving as joint task force (JTF) 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 use this publication as well. ADP 3-0 uses joint terms where applicable. Selected joint and Army terms and definitions appear in both the glossary and the text. Terms for which ADP 3-0 is the proponent publication (the authority) are marked with an asterisk (*) in the glossary. Definitions for which ADP 3-0 is the proponent publication are boldfaced inthe text. For other definitions shown in the text, the term is italicized and the number of the proponent publication follows the definition.ADP 3-0 applies to the Active Army, Army National Guard/Army National Guard of the United States, and United States Army Reserve unless otherwise stated.ADP 3-0 contains five chapters and one appendix: Chapter 1 defines military operations, in context, for the Army. It describes the variables that shape the nature of an operational environment and affect outcomes. It provides explanation of unified action and joint operations as well as land operations and the Army's four strategic roles. Finally, it discusses the importance of training to gain skill in land warfare.Chapter 2 is a discussion on the application of operational art. It details how commanders should consider defeat and stability mechanisms when developing an operational approach. It presents the elements of operational art and describes their meaning.Chapter 3 addresses the Army's operational concept of unified land operations. It describes how commanders will likely apply landpower as part of unified action to defeat enemy forces on land and establish conditions that accomplish the joint force commander's (JFC's) objectives. Chapter 3 defines the principles and tenets of unified land operations.Chapter 4 provides the operations structure commanders use to array forces and conduct operations. It also includes the operational framework used in the conduct of unified land operations.Chapter 5 defines combat power. It discusses the elements of combat power and describes the six warfighting functions used to generate combat power. Lastly, it discusses how Army forces organize combat power through force tailoring, task organization, and mutual support.Appendix A addresses command and support relationships. It describes these as the basis for unity of command and unity of effort in operations. It details how command relationships and authorities affect Army force generation, force tailoring, and task organization. It further discusses how commanders use Army support relationships when task-organizing Army forces.