2-34. Army forces accomplish their missions through the operational concept called unified land operations. 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). Army forces defeat enemy forces, control terrain, protect populations, and preserve joint force freedom of action in the land domain by applying the Army core competencies. Army operations conducted overseas encompass offensive, defensive, and stability operations. Within the United States, the Army supports civil authorities through DSCA. If enemy forces threaten the homeland, Army forces combine offense and defense with DSCA. The effort accorded to each element is proportional to the mission and varies with the situation and conditions of an operational environment. (See figure 2-5.)