text: Chapter 1
  support tools required to provide operational readiness rates, near real-time total asset visibility, and in-transit
  visibility of assets.
  ENABLE FREEDOM OF ACTION, EXTEND OPERATIONAL REACH,
  AND PROLONG ENDURANCE
  1-55. The sustainment warfighting function, guided by the sustainment principles, is essential for generating
  combat power and conducting operations as the Army performs its strategic roles. Sustainment provides the
  operational commander the freedom of action, extended operational reach, and prolonged endurance
  necessary to shape OEs, counter aggression on land during crisis, prevail during large-scale ground combat,
  and consolidate gains.
  ENABLE FREEDOM OF ACTION
  1-56. Freedom of action enables commanders to achieve operational initiative and maintain tempo.
  Successful sustainment commanders facilitate freedom of action by planning and executing sustainment
  activities able to support the greatest possible number of courses of action for the supported commander in a
  particular situation. Effective sustainment execution employs the principles of continuity and responsiveness
  needed by supported commanders to operate freely.
  1-57. Sustainers enable freedom of action by conducting sustainment preparation of the OE, synchronizing
  the sustainment plan with the scheme of maneuver and scheme of protection, and maintaining flexibility and
  disciplined initiative while supporting maneuver commanders. The proper application of mission command
  to sustainment operations encourages the greatest possible freedom of action for subordinates. Appropriate
  sustainment unit command and support relationships equip subordinate commanders with the authority and
  flexibility to act boldly and create desired support effects in the absence of continuous direction from higher
  headquarters.
  EXTEND OPERATIONAL REACH
  1-58. Operational reach is the distance and duration across which a force can successfully employ military
  capabilities (JP 3-0). Army forces require significant sustainment support and capabilities to strike, disrupt,
  or destroy enemy forces throughout their depth, preventing the effective employment of enemy reserves,
  enemy command and control nodes, enemy sustainment, and other enemy capabilities not in direct contact
  with friendly forces. Operations in depth disrupt the enemy's decision cycle and contribute to protecting the
  force by destroying enemy capabilities before the enemy can use them.
  1-59. Sustainment operations are critical to extending operational reach. The Army's sustainment capability
  assists in providing crucial theater and port opening functions that further enable the strategic and operational
  reach of the joint force. Extended operational reach requires gaining and maintaining operational access in
  the face of enemy antiaccess and area denial capabilities and actions. The sustainment principles of
  continuity, survivability, and integration are integral in extending operational reach and preventing
  culmination.
  PROLONG ENDURANCE
  1-60. Endurance refers to the ability to employ combat power anywhere for protracted periods. It stems from
  the ability to organize, protect, and sustain a force, regardless of the distance from its base and the austerity
  of the environment. Endurance involves the principles of anticipation, improvisation, and economy.
  Anticipating requirements and making the most effective, efficient use of available resources provides
  endurance and gives Army forces their campaign quality. Sustainment leaders use improvisation to adapt
  operations to situations and circumstances to maintain endurance.
  1-61. Sustainment provides the support necessary to ensure operations continue until mission
  accomplishment. Sustainment also provides the capabilities necessary for maintaining the personnel and
  materiel replacements essential to maintaining combat power. Sustainment support that prolongs endurance
  requires the synchronization of the elements of sustainment with the concept of operations.