text: Chapter 9
  easily develop. Commanders are responsible for fires and movement planning between the positions of their
  subordinate units.
  PLANNING AN AREA DEFENSE
  9-18. The key to a successful area defense is the integration and synchronization of all available assets. The
  general defensive planning considerations addressed in Chapter 8 apply to the area defense. They assign
  missions, allocate forces, and apportion functional and multifunctional support and sustainment resources.
  Commanders decide where to concentrate their efforts and where to take risks. They can rapidly redirect
  attack aviation and field artillery systems initially allocated to supporting efforts to support their main effort
  at the appropriate time.
  9-19. Units organize their forces differently for contiguous and noncontiguous assigned areas. Figure 9-2
  graphically depicts the organization of forces for an area defense in contiguous assigned areas while figure
  9-3 graphically depicts the organization of forces for an area defense in noncontiguous assigned areas. Figure
  9-2 does not designate the exact security missions performed by security forces because those vary from
  screen to cover based on the mission variables.
  Figure 9-2. Organization of forces for an area defense, contiguous assigned areas