Army Doctrine Reference Publication (ADRP) 3-0, Unified Land Operations, is the first ADRP released under Doctrine 2015. ADRP 3-0 expands on the foundations and tenets found in Army Doctrine Publication (ADP) 3-0. This ADRP expands on the doctrine of unified land operations found in ADP 3-0. The publication of ADP 3-0 shifted the Army's operational concept from full spectrum operations to unified land operations. The doctrine of unified land operations describes how the Army demonstrates its core competencies of combined arm maneuver and wide area security through decisive action. The term decisive action replaces the term full spectrum operations as the concept of continuous, simultaneous offense, defense, stability, or defense support of civil authorities. Defense support of civil authorities replaces civil support as a task under decisive action. ADRP 3-0 expands the discussion of the foundations and tenets of unified land operations, as well as the operational framework found in ADP 3-0. Additional changes in ADRP 3-0 from the now obsolete 2011 FM 3-0, Change 1, includes a discussion of the range of military operations replacing the spectrum of conflict as well as a discussion of information collection replacing intelligence, reconnaissance, and surveillance (known as ISR). These changes in ADRP 3-0 now better align Army doctrine with the joint discussion of the principles of joint operations. ADRP 3-0 remains generally consistent with the now obsolete 2011 FM 3-0, Change 1, on key topics while adopting updated terminology and concepts as necessary. These topics include the discussion of an operational environment and the operational and mission variables, as well as the discussions of unified action, law of land warfare, and combat power. As in the now obsolete 2011, FM 3-0, Change 1, mission command remains both a philosophy of command and a warfighting function. Finally, ADRP 3-0 maintains combined arms as the application of arms that multiplies Army forces' effectiveness in all operations. ADRP 3-0 contains four chapters: Chapter 1 shortens the discussion of the operational environment found on the now obsolete 2011 FM 3-0, Change 1, and emphasizes military operations. This chapter provides a framework of variables of an operational environment that shape their nature and affect outcomes. The chapter then discusses unified action and joint operations as well as land operations. Finally, this chapter discusses law of land warfare and combined arms. Chapter 2 introduces the Army's new operational concept of unified land operations. It discusses how commanders apply landpower as part of unified action to defeat the enemy on land and establish conditions that achieve the joint force commander's end state. Chapter 2 discusses how commanders demonstrate the Army's new core competencies of combined arms maneuver and wide area security conducted through decisive action. Chapter 3 discusses combat power and the warfighting functions used to generate combat power in support of unified land operations. As in the now obsolete 2011 FM 3-0, Change 1, chapter 3 discusses the eight elements of combat power that include the six warfighting functions with leadership and information. Lastly, it discusses how Army forces achieve combined arms through force tailoring, task organization, and mutual support. Chapter 4 discusses the elements of operational art and the meaning of operational art to Army forces. It elaborates on commanders and staffs applying the elements of operational art to understand, visualize, and describe how to establish conditions to achieve a desired end state. It discusses how operational art represents a creative approach to dealing with the direction of military forces and expresses an informed vision across the levels of war.