text: Defense
  Figure 7-12. Forward defense
  Engagement Area
  7-130. Anengagement areais an area where the commander intends to contain and destroy an enemy force
  with the massed effects of all available weapons and supporting systems (ADP 3-90). The success of any
  engagement depends on how effectively the BCT commander integrates the direct fire plan,the indirect-fire
  plan,the obstacle plan(see ATP 3-90.8),Army aviation fires,close air support,and the terrain within the EA
  to achieve the BCT’s tactical purpose.
  7-131. Effective use of terrain reduces the effects of enemy fires,increases the effects of friendly fires,and
  facilitates surprise. Terrain appreciation—the ability to predict its impact on operations—is an important skill
  for every leader. For tactical operations,commanders analyze terrain using the five military aspects of terrain,