text: Chapter 10
  Engineer Support
  The OPFOR believes success in battle requires extensive engineer support
  at every level. Engineer plans at the operational level support the various
  strategic-level courses of action involved in the State’s strategic campaign.
  Engineers facilitate the mobility and high rate of movement of combined
  arms forces while enhancing the survivability of forces. Although the
  OPFOR generally conducts engineer countermobility activities at the
  tactical level, it also maximizes activities conducted at the operational
  level to disaggregate, disrupt, delay, block, or canalize enemy forces. See
  FM 7-100.2 for more information on tactical-level engineer actions.
  ASSETS
  10-1. Military engineers fall into two basic categories: combat engineers and
  special-category engineers. Combat engineers are those whose tasks may
  bring them in direct contact with the enemy. Special-category engineers (such
  as bridge- and road-building units) do not normally engage the enemy and
  generally use utility vehicles as their primary transportation rather than
  engineer vehicles designed to survive close combat. Together, these two
  categories of engineers are responsible for the more difficult and complex
  engineering tasks. Their missions require specialized training and the use of
  special equipment or munitions. Often the distinction of engineer categories is
  blurred somewhat depending on task organizations and their mission-driven
  employment.
  10-2. At the operational level, the OPFOR plans the complete integration of
  civilian and military engineer resources. For example, maneuver command-
  ers may use civilian earthmoving, road-building, and construction equipment
  and personnel, especially in support zones. This allows constituent combat
  engineer equipment and personnel to accompany maneuver forces in battle.
  Civilian workers or maneuver units can perform many basic combat engineer
  tasks, with engineers providing guidance and technical expertise.
  COMMAND AND CONTROL
  10-3. Engineer units allocated to an operational-strategic command (OSC) in
  constituent or dedicated relationships may be directly under the command of
  the OSC commander. The OSC commander or his subordinate commanders
  can controlbut do not commandother engineer assets that are allocated to
  them in a supporting relationship. Rather than keeping all allocated engineer
  assets under his direct command and control (C2), the OSC commander may
  suballocate some engineer units to his subordinate maneuver units or to his
  integrated fires command (IFC) and/or integrated support command (ISC).