text: Chapter 1
  battlefield coordination detachment — (DOD) An Army liaison located in the air operations center that
  provides selected operational functions between the Army forces and the air component commander. (JP 3-
  03)Also called BCD.
  beach capacity — The per day estimate expressed in terms of measurement tons, weight tons, or cargo
  unloaded over a designated strip of shore. (ATP 4-13)
  begin morning nautical twilight — (DOD) The start of that period where, in good conditions and in the absence
  of other illumination, the sun is 12 degrees below the eastern horizon and enough light is available to identify
  the general outlines of ground objects and conduct limited military operations. (JP 3-09.3) Also called BMNT.
  be-prepared mission — A mission assigned to a unit that might be executed. (FM 5-0)
  biological agent — (DOD) A microorganism (or a toxin derived from it) that causes disease in personnel, plants,
  or animals or causes the deterioration of materiel. (JP 3-11)
  biological hazard — (DOD) An organism, or substance derived from an organism, that poses a threat to human
  or animal health. (JP 3-11)
  biometrics — (DOD) The process of recognizing an individual based on measurable anatomical, physiological,
  and behavioral characteristics. (JP 2-0)
  biometrics-enabled intelligence — (Army) Intelligence resulting from the combination of biometric information
  with other intelligence, threat information, or information relating to other aspects of the operational
  environment in order to answer intelligence requirements. (ATP 2-22.82) Also called BEI.
  blister agent — (DOD) A chemical agent that injures the eyes and lungs and burns or blisters the skin. (JP 3-11)
  Also called vesicant agent.
  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. (FM 3-90)
  blood agent — (DOD) A chemical compound, including the cyanide group, that affects bodily functions by
  preventing the normal utilization of oxygen by body tissues. (JP 3-11)
  blood chit — (DOD) A small sheet of material depicting an American flag and a statement in several languages
  to the effect that anyone assisting the bearer to safety will be rewarded. (JP 3-50)
  blue kill box — A fire support and airspace coordination measure that facilitates attacking surface targets with
  air-to-surface munitions without further coordination with the area of operations commanders’ headquarters.
  (ATP 3-09.34) Also called BKB.
  board — A grouping of predetermined staff representatives with delegated decision authority for a particular
  purpose or function. (FM 6-0)
  boost phase — (DOD) That portion of the flight of a ballistic missile or space vehicle during which the booster
  and sustainer engines operate. (JP 3-01)
  boundary — (DOD) 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. (FM 3-90)
  box formation — A movement formation with elements arranged in a box or square, or two elements up and
  two elements back. (FM 3-90)
  branch — (DOD) 1. A subdivision of any organization. 2. A geographically separate unit of an activity, which
  performs all or part of the primary functions of the parent activity on a smaller scale. 3. An arm or service of
  the Army. 4. The contingency options built into the base plan used for changing the mission, orientation, or
  direction of movement of a force to aid success of the operation based on anticipated events, opportunities, or
  disruptions caused by enemy actions and reactions. (JP 5-0)
  breach — 1. A tactical mission task in which a unit breaks through or establishes a passage through an enemy
  obstacle. (FM 3-90) 2. A synchronized combined arms activity under the control of the maneuver commander
  conducted to allow maneuver through an obstacle. (ATP 3-90.4)
  breach area — A defined area where a breach occurs. (ATP 3-90.4)
  breakbulk ship — (DOD) A ship with conventional holds for stowage of breakbulk cargo and a limited number of
  containers, below or above deck, and equipped with cargo-handling gear. (JP 4-09)
  breakout — An operation conducted by an encircled force to regain freedom of movement or contact with
  friendly units. (ADP 3-90)
  breakpoint chlorination — The application of chlorine to water containing free ammonia. (ATP 4-44)
  breakthrough — A rupturing of the enemy’s forward defenses that occurs as a result of an attack. (FM 3-90)