1-28. An operation is a sequence of tactical actions with a common purpose of unifying theme (JP 1). Army forces, as part of the joint and multinational force, contribute to the joint mission through the conduct of unified land operations. Unified land operations is the Army's operational concept and contribution to unified action; it is how the Army applies combat power. Unified land operations is the simultaneous execution of offense, defense, stability, and defense support of civil authorities across multiple domains to shape operational environments, prevent conflict, prevail in large-scale ground combat, and consolidate gains as part of unified action (ADP 3-0). The goal of unified land operations is to establish conditions that achieve the joint force commander's end state by applying landpower as part of a unified action to defeat the enemy. Military forces seek to prevent or deter threats through unified action, and, when necessary, execute operations to defeat aggression.