text: Glossary
  *seize
  (Army) A tactical mission task in which a unit takes possession of a designated area by using
  overwhelming force.
  sequential relief in place
  Occurs when each element within the relieved unit is relieved in succession, from right to left, left to
  right, front to rear, or rear to front. (ADP 3-90)
  simultaneous relief in place
  Occurs when all elements are relieved at the same time. (ADP 3-90)
  *single envelopment
  A variation of envelopment where a force attacks along one flank of an enemy force.
  situational obstacle
  An obstacle that a unit plans and possibly prepares prior to starting an operation, but does not execute
  unless specific criteria are met. (ATP 3-90.8/MCTP 3-34B)
  special reconnaissance
  Reconnaissance and surveillance actions conducted as a special operation in hostile, denied, or
  diplomatically and/or politically sensitive environments to collect or verify information of strategic or
  operational significance, employing military capabilities not normally found in conventional forces.
  (JP 3-05)
  *spoiling attack
  A variation of an attack employed against an enemy preparing for an attack.
  stability operation
  An operation conducted outside the United States in coordination with other instruments of national
  power to establish or maintain a secure environment and provide essential governmental services,
  emergency infrastructure reconstruction, and humanitarian relief. (ADP 3-0)
  staggered relief in place
  Occurs when each element is relieved in a sequence determined by the tactical situation, not its
  geographical orientation. (ADP 3-90)
  standard use Army aircraft flight route
  Route established below the coordination level to facilitate the movement of Army aircraft. (JP 3-52)
  *start point
  A designated place on a route where elements fall under the control of a designated march commander.
  *stay-behind operation
  An operation in which a unit remains in position to conduct a specified mission while the remainder of
  the force withdraws or retires from an area.
  striking force
  A dedicated counterattack force in a mobile defense constituted with the bulk of available combat
  power. (ADP 3-90)
  strong point
  A heavily fortified battle position tied to a natural or reinforcing obstacle to create an anchor for the
  defense or to deny the enemy decisive or key terrain. (ADP 3-90)
  *subsequent position
  A position that a unit expects to move to during the course of battle.
  *supplementary position
  A defensive position located within a unit’s assigned area that provides the best sectors of fire and
  defensive terrain along an avenue of approach that is not the primary avenue where the enemy is
  expected to attack.