text: Glossary
  relief in place
  (Army) An tactical enabling operation in which, by direction of higher authority, all or part
  of a unit is replaced in an area by the incoming unit (FM 3-90).
  reserve
  Portion of a body of troops which is kept to the rear or withheld from action at the beginning
  of an engagement, in order to be available for a decisive movement (JP 1-02).
  resistance movement
  An organized effort by some portion of the civil population of a country to resist the legally
  established government or an occupying power and to disrupt civil order and stability
  (JP 1-02).
  resource controls
  Controls that regulate the movement or consumption of materiel resources, mobilize materiel
  resources, and deny materiel to the guerrilla.
  revolution
  The overthrow or renunciation of one government or ruler and the substitution of another by
  the governed.
  risk
  (DOD) Probability and severity of loss linked to hazards (JP 1-02).
  risk management
  The process of identifying, assessing, and controlling risk arising from operational factors,
  and making decisions that balance risk cost with mission benefits (JP 1-02).
  rule of law
  A principle under which all persons, institutions, and entities, public and private, including
  the state itself, are accountable to laws that are publicly promulgated, equally enforced,
  and independently adjudicated, and that are consistent with international human rights
  principles (FM 3-07).
  rules of engagement
  (Joint) Directives issued by competent military authority that delineate the circumstances
  and limitations under which United States forces will initiate or continue combat engagement
  with other forces encountered (JP 1-02).
  running estimate
  A staff section’s continuous assessment of current and future operations to determine if the
  current operation is proceeding according to the commander’s intent and if future operations
  are supportable (FMI 5-0.1).
  search and attack
  A technique of conducting a movement to contact that shares many of the characteristics
  of an area security mission (FM 3-0).
  sabotage
  (DOD) An act or acts with intent to injure, interfere with, or obstruct the national defense of a
  country by willfully injuring or destroying, or attempting to injure or destroy, any national
  defense or war materiel, premises, or utilities, to include human and natural resources.
  security
  (Joint) 1. Measures taken by a military unit, an activity or installation to protect itself against
  all acts designed to, or which may, impair its effectiveness. 2. A condition that results from