This publication, Army Doctrine Publication ADP 2-0 Intelligence September 2018, which replaces both the 2012 version of both ADP 2-0 and ADRP 2-0 is the Army's most fundamental publication for Army intelligence. ADP 2-0 provides a common construct for intelligence doctrine from which Army forces adapt to conduct operations. ADP 2-0 augments and is nested with the capstone doctrine from both ADRP 3-0 and FM 3-0. The principal audience for ADP 2-0 is every Soldier and Department of the Army Civilian who interact with the intelligence warfighting function. This publication is the foundation for the intelligence warfighting function and subsequent doctrine development. It also serves as a reference for personnel who are developing doctrine, leader development, materiel and force structure, and institutional and unit training for intelligence. ADP 2-0 uses joint terms where applicable. Selected joint and Army terms and definitions appear in both the glossary and the text. Terms for which ADP 2-0 is the proponent publication (the authority) are marked with an asterisk (*) in the glossary. Definitions for which ADP 2-0 is the proponent publication are boldfaced in the text. For other definitions shown in the text, the term is italicized and the number of the proponent publication follows the definition. ADP 2-0 applies to the Active Army, the Army National Guard/Army National Guard of the United States, and the U.S. Army Reserve unless otherwise stated. The future for our Army is challenging. In order to prepare for an unknowable future, the Army must be ready to conduct the full range of military operations, with a focus on large-scale combat operations. The Army will operate across multiple domains with unified action partners. We must deploy and transition rapidly to large-scale combat operations, present multiple dilemmas to the enemy, operate dispersed while maintaining decisive effects, and consolidate gains. Intelligence, especially warning intelligence and other aspects of setting the theater of operations, is integral to operations, as the theater army competes with peer threats below the level of armed conflict. Friendly forces attempt to maintain an enduring initiative during operations to shape and prevent. However, enemies are likely to initiate hostilities against friendly forces from initial positions of relative advantage. Therefore, Army forces will conduct operations across multiple domains to gain freedom of action for other members of the joint force. Units must be prepared to fight for intelligence against a range of threats, enemy formations, and unknowns. These challenges include integrated air defense systems and long-range fires, counterreconnaissance, cyberspace and electronic warfare operations, deception operations, and camouflage. These complexities place a significant demand on intelligence professionals for real-time detailed intelligence to develop situational understanding and answer the commander's priority intelligence requirements. Intelligence enables mission command, facilitates initiative, and allows commanders and staffs to execute tailored solutions for complex problems in the fast-paced environments of the future. From this understanding, commanders can better identify windows of opportunity during operations to converge capabilities for best effect. Ready access to the intelligence networks facilitates timely decision making and provides commanders the flexibility to successfully shape and execute operations. ADP 2-0, Intelligence, provides a common construct for intelligence support in complex operational environments and a framework to support unified land operations across the range of military operations. This publication serves as the intelligence doctrinal foundation for our Army. Every Army professional must understand the doctrinal principles of Army intelligence.