text: Glossary
  *block
  1.A tactical mission task that denies the enemy access to an area or an avenue of approach. 2. An
  obstacle effect that integrates fire planning and obstacle effort to stop an attacker along a specific
  avenue of approach or prevent the attacking force from passing through an engagement area.
  boundary
  A line that delineates surface areas for the purpose of facilitating coordination and deconfliction of
  operations between adjacent units, formations, or areas. (JP 3-0)
  *bounding overwatch
  A movement technique used when contact with enemy forces is expected.
  *box formation
  A movement formation with elements arranged in a box or square, or two elements up and two
  elements back.
  *breach
  A tactical mission task in which a unit breaks through or establishes a passage through an enemy
  obstacle.
  breach area
  The area where a breaching operation occurs. (ATP 3-90.4/MCTP 3-34A)
  breakout
  An operation conducted by an encircled force to regain freedom of movement or contact with friendly
  units. (ADP 3-90)
  *breakthrough
  A rupturing of the enemy’s forward defense that occurs as a result of an attack.
  bridgehead
  An area on the enemy’s side of the linear obstacle that is large enough to accommodate the majority of
  the crossing force, has adequate terrain to permit defense of the crossing sites, provides security of
  crossing forces from enemy direct fire, and provides a base for continuing the attack. (ATP 3-90.4/
  MCTP 3-34A)
  bridgehead force
  A force that assaults across a gap, after the crossing is established, to secure the enemy side (the
  bridgehead) to allow the buildup and passage of a breakout force during gap crossing.
  (ATP 3-90.4/MCTP 3-34A)
  bridgehead line
  The limit of the objective area in the development of the bridgehead. (ATP 3-90.4/MCTP 3-34A)
  *bypass
  A tactical mission task in which a unit deliberately avoids contact with an obstacle or enemy force.
  *bypass criteria
  Measures established by higher echelon headquarters that specify the conditions and size under which
  enemy units and contact may be avoided.
  *canalize
  (Army) A tactical mission task in which a unit restricts enemy movement to a narrow zone.
  casualty evacuation
  (Army) Nonmedical units use this to refer to the movement of casualties aboard nonmedical vehicles
  or aircraft without en route medical care. (FM 4-02)
  *checkpoint
  A predetermined point on the ground used to control movement, tactical maneuver, and orientation.