text: FM 7-100.1________________________________________________________________________________
  10-66. The basic engineer missions during adaptive operations remain
  reconnaissance, countermobility, survivability, and mobility, along with the
  task of support to IW. These all occur at all levels of command all over the
  battlefield, and priorities of engineer effort vary according to the specific
  situation, which can be unpredictable. Examples of how these missions and
  tasks support adaptive operations are listed below.
  Reconnaissance
  10-67. The focus of engineer reconnaissance during adaptive operations
  will be on areas that support the creation of windows of opportunity or the
  exploitation of opportunities that result from existing conditions in the AOR.
  Engineers can help determine the most likely routes the enemy might take,
  as well as identify routes for OPFOR units undertaking counterattacks or the
  maneuver component of a strike.
  Countermobility
  10-68. The OPFOR makes extensive use of countermobility operations to con-
  trol access and tempo by delaying, disaggregating, and canalizing enemy
  forces. The obstacle plan is completely integrated with the maneuver, fire
  support, and IW plans. Minefields and other obstacles used in support of
  adaptive operations are extremely innovative, irregular-shaped, and thoroughly
  merged with the terrain. Minefields also tend to be much smaller than those laid
  in regional operations (especially linear operations). Many are nuisance mine-
  fields, rather than being designed to destroy large numbers of enemy forces.
  Survivability
  10-69. The construction of battle and fighting positions is a labor-intensive
  process and is therefore a shared responsibility of engineers and supported
  units. Maximum use of civilian engineer assets and personnel continues dur-
  ing adaptive operations. Survivability activities during adaptive operations
  have several unique engineer requirements. Some examples are to—
  • Take full advantage of the screening, protective, C3D techniques, along
  with careful selection of terrain to passively deny the enemy the ability
  to acquire OPFOR positions for targeting.
  • Make extensive use of local building materials, equipment, and work force.
  • Protect CPs and logistics sites.
  • Bury communications lines.
  • Construct false positions, equipment, movement routes, and lines of
  communication.
  • Assimilate minefields and obstacles to the terrain.
  • Prepare caves, tunnels, and tunnel complexes in which troops can live
  and from which they can fight.
  Mobility
  10-70. It is critical that the OPFOR maintain the ability to move unimpeded
  during adaptive operations. This ability allows the OPFOR to control the ac-
  cess and tempo of enemy forces. As long as the OPFOR has complete access to