text: Appendix B
  FIX
  B-35. Fix is a tactical mission task in which a unit prevents the
  enemy from moving from a specific location for a specific period.
  This may occur by engaging an enemy force to prevent its withdrawal
  for use elsewhere, or by using deception, such as transmitting false
  orders. A commander uses fix in offensive and defensive actions; it is
  always a supporting effort. The point of the arrow faces toward the
  desired enemy unit to fix. The broken part of the arrow indicates the
  desired location for that event to occur. Figure B-16 depicts the fix
  tactical mission task.
  B-36. Fixing an enemy force does not mean destroying it. The friendly Figure B-16. Fix task
  force has to prevent the enemy force from moving in any direction. This
  task usually has a time constraint, such as “fix the enemy reserve force until OBJECTIVE FALON is
  secured.” The tactical mission task of fix differs from that of block in that a fixed enemy force cannot move
  from a given location, but a blocked enemy force can move in any direction other than the one obstructed.
  B-37. Fix is an obstacle effect that focuses fire planning and
  obstacle effort to slow an attacker’s movement within a
  specified area, normally an engagement area. The primary use
  of this effect is to give a friendly force time to acquire, target, and
  destroy an attacking enemy force with direct and indirect fires
  throughout the depth of an engagement area or avenue of
  approach. The irregular part of the arrow in the obstacle intent
  graphic indicates the location where complex obstacles slow the
  enemy force’s rate of advance. The arrow indicates the direction
  of enemy force’s advance. Figure B-17 depicts the fix obstacle
  Figure B-17. Fix obstacle effect
  effect.
  FOLLOW AND ASSUME
  B-38. Follow and assume is a tactical mission task in which
  a committed force follows and supports a lead force
  conducting an offensive operation and continues the mission
  if the lead force cannot continue. The lead force may be unable
  to continue for several reasons such as becoming fixed or
  attrited by enemy forces. The follow and assume force is not a
  reserve, but it is committed to accomplish specific tasks.
  Planners place the box part of the associated task military
  symbol around the icons of units assigned this task. Figure B-18
  depicts the follow and assume tactical mission task.
  Figure B-18. Follow and assume
  B-39. Tasks for a follow and assume force include— task
  * Preparing to execute all missions of the followed
  unit.
  * Maintaining contact with the trail elements of the leading force.
  * Preparing to conduct a forward passage of lines through the force it is following.
  * Monitoring all combat information and intelligence being provided to and from the force it is
  following.
  * Avoiding engaging enemy forces bypassed by the force it is following.
  B-40. A commander assigns a follow and assume mission to ensure that the attacking force maintains the
  momentum of its offensive action. The follow and assume force ensures it can immediately execute a forward
  passage of lines and assume the lead force’s mission.
  B-41. A commander assigning a unit mission the task of follow and assume has two options in establishing
  the relationship between the lead and trail units. Commanders normally retain command of both units and