ADP 3-90, page 11
Offense and Defense
Army Doctrine Publication: Offense and Defense
July 2019 public edition (supersedes Aug 2018); key terrain cited in S2 KOCOA
Searchable page text (OCR / PDF)
31 July 2019
ADP 3-90
1-1
Chapter 1
Tactical Fundamentals
Commanders consider their actions strategic, operational, or tactical based on whether
they achieve a strategic, operational, or tactical objective. This chapter addresses the
tactical level of warfare, the art and science of tactics, solving tactical problems, and
hasty versus deliberate operations.
TACTICS
1-1. Tactics is the employment, ordered arrangement, and directed actions of forces in relation to
each other. ADP 3-90 is the primary publication for the offense and defense at the tactical level. It is
authoritative and provides guidance in the form of combat-tested concepts and ideas modified to take
advantage of Army and joint capabilities. It focuses on the tactics used to employ current capabilities to
prevail in combat. Tactics are not prescriptive. Tacticians use creativity to develop solutions for which enemy
forces are neither prepared nor able to cope.
1-2. Tactics always require judgment and adaptation to a situation’s unique circumstances. Techniques and
procedures are established patterns or processes that can be applied repeatedly with little judgment to various
circumstances. Together, tactics, techniques, and procedures (TTP) provide commanders and staffs with the
fundamentals to develop solutions to tactical problems. The solution to any specific problem is a unique
combination of these fundamentals, current TTP, and the creation of new TTP based on an evaluation of the
situation. Commanders determine acceptable solutions by mastering doctrine and current TTP. They gain
this mastery through experiences in education, training, and operations.
THE TACTICAL LEVEL OF WARFARE
1-3. The tactical level of warfare is the level of warfare at which battles and engagements are planned and
executed to achieve military objectives assigned to tactical units or task forces (JP 3-0). Activities at this
level focus on achieving assigned objectives through the ordered arrangement, movement, and maneuver of
combat elements in relation to each other and to enemy forces. The strategic and operational levels of warfare
provide the context for tactical operations. (See JP 3-0 and ADP 3-0 for more discussions on strategic and
operational levels of warfare.) Without this context, tactical operations become disconnected from
operational end states and strategic goals.
1-4. An engagement is a tactical conflict, usually between opposing lower echelon maneuver forces
(JP 3-0). Brigades and lower echelon units generally conduct engagements. Engagements result from
deliberate closure with or chance encounters between two opponents.
1-5. A battle is a set of related engagements that lasts longer and involves larger forces than an
engagement. Battles affect the course of a campaign or major operation, as they determine the outcome of a
division or corps echelon achieving one or more significant objectives. The outcomes of battles determine
strategic and operational success and contribute to the overall operation or campaign achieving a strategic
purpose. The outcomes of engagements determine tactical success and contribute to friendly forces winning
a battle.
1-6. Echelons of command, sizes of units, types of equipment, or components do not define the strategic,
operational, or tactical levels of warfare. Instead, the level of warfare is determined by what level objective
is achieved by the action. National assets, including space-based and cyberspace capabilities previously
considered principally strategic, provide important support to tactical operations.