text: Appendix B
  B-13. If the bypassing force cannot avoid the enemy force, then the bypassing force fixes the enemy force
  with part of its maneuver elements and bypasses it with the
  balance of the force. (See figure B-6.) Generally, a
  commander will not attempt to bypass an enemy force if
  more than a third of the unit’s combat power is required to
  fix the enemy force. The commander assigns one
  subordinate unit the mission of fixing the enemy force in this
  situation, reinforcing the fixing force as required by the
  mission variables. The fixing force coordinates with the unit
  assigned to relieve the fixing force as soon as possible and
  provides the new unit with all available information about
  the enemy and terrain. The relieving unit is normally another
  unit assigned a follow and support task. Once relieved, the
  force fixing the enemy force either rejoins its parent
  organization or becomes part of the following element and
  comes under its control.
  B-14. Occasionally a commander may direct the fixing
  force to break contact with the enemy force after the
  Figure B-6. Task force conducting a
  bypassing force completes the bypass. This occurs when the
  fix and a bypass
  bypassing force has no requirement to maintain an
  uninterrupted logistics flow, such as in a raid. In this case,
  the fixing force fixes the enemy force by employing defensive and limited offensive actions in
  synchronization with all available fire support until ordered to rejoin the bypassing force.
  CANALIZE
  B-15. Canalize is a tactical mission task in which a unit restricts
  enemy movement to a narrow zone. Friendly forces do this by
  exploiting terrain coupled with the use of obstacles, fires, or friendly
  maneuver. Successful canalization results in moving the enemy
  formation, individual Soldiers, or weapon systems into a predetermined
  position where they are vulnerable to piecemeal destruction. Figure B-7
  depicts the canalize tactical mission task.
  Figure B-7. Canalize task
  CLEAR
  B-16. Clear is a tactical mission task in which a unit eliminates all
  enemy forces within an assigned area. Friendly forces do this by
  destroying, capturing, or forcing the withdrawal of enemy forces, so they
  cannot execute organized resistance and interfere with the friendly unit’s
  mission. In all cases, this task requires a thorough reconnaissance to
  discover the enemy force’s locations. After discovering the enemy
  force’s location, the clearing force maneuvers against the enemy force.
  The bar connecting the arrows designates the desired limit of advance
  for the clearing force. The bar also establishes the width of the area to
  clear. Figure B-8 depicts the clear tactical mission task. Figure B-8. Clear task
  B-17. This task requires significant time and other resources. In the
  mission statement, a commander can modify the objective associated with this task to destroying, capturing,
  or forcing the withdrawal of only enemy forces larger than a stated size. In this case, the clearing force keeps
  smaller enemy forces under observation, while the rest of the friendly force bypasses them.
  B-18. Clear is also a mobility task that involves the total elimination of an obstacle that is usually performed
  by follow-on engineers and is not done under fire. Units conduct clearing operations to eliminate completely
  the enemy’s obstacle effort or the residual obstacles affecting the operational area. (See FM 3-90.4 for more
  information on mobility clearing operations.)