text: Glossary
  trigger line
  A phase line located on identifiable terrain used to initiate and mass fires into an engagement area at a
  predetermined range. (FM 3-90)
  troop movement
  The movement of Soldiers and units from one place to another by any available means. (FM 3-90)
  unified action partners
  Those military forces, governmental and nongovernmental organizations, and elements of the private
  sector with whom Army forces plan, coordinate, synchronize, and integrate during the conduct of
  operations. (ADP 3-0)
  *unobserved fire
  Projectile points of impact or burst not observed.
  *weapons locating radar
  A continuous target acquisition counterbattery system that detects in-flight projectiles, and
  communicates point of origin and point of impact locations.
  weaponeering
  The process of determining the specific means required to create a desired effect on a given target. (JP
  3-60)
  withdraw
  To disengage from an enemy force and move in a direction away from the enemy. (ADP 3-90)
  zone
  An operational area assigned to a unit in the offense that only has rear and lateral boundaries. (FM 3-0)
  zone of fire
  An area into which a designated ground unit or fire support ship delivers, or is prepared to deliver, fire
  support. (JP 3-09)