text: Introduction
  The content of this update remains generally consistent with the 2013 publication on key topics while
  adopting updated terminology and concepts as necessary. Key topics include AHS, FHP, Health Service
  Support, ten medical functions, and law of land warfare and medical ethics.
  The material presented in this publication reflects enduring practices in providing timely AHS support to the
  tactical commander. This publication depicts AHS operations from the point of injury or wounding through
  successive roles of care within the area of operations and evacuation to the continental United States-support
  base.
  Summary of changes include:
  * Aligning this publication with Army hierarchy publications including FM 3-0 and FM 4-0.
  * Aligning this publication with Joint Publication 4-02, Joint Health Services’ FHP and HSS
  definitions and descriptions.
  * Reorganizing the order of the publication; FHP is now Part Two while HSS is Part Three.
  * Revising the definitions of the following terms: Army Health System, force health protection,
  health service support, definitive care, essential care, and triage.
  * Replacing the mission command medical function with medical command and control; this is in
  line with ADP 6-0.
  * Replacing “field preventive medicine” with “operational public health” according to AR 40-5.
  * Adding Global Health Engagement information.
  * Adding hospital center information.
  * Adding an appendix discussing AHS support to the Army’s strategic roles (shape operational
  environments, prevent conflict, prevail in large-scale ground combat, consolidate gains).
  * Adding an appendix derived from FM 3-0 discussing command and support relationships.
  * Adding a surgeon and surgeon section appendix.
  * Adding the approved medical symbols appendix.
  As the Army’s AHS doctrine statement, this publication identifies medical functions and procedures that are
  essential for operations covered in other Army Medicine proponent manuals. This publication depicts AHS
  operations from the point of injury or wounding, through successive roles of care within the area of
  operations, and evacuation to the continental United States (U.S.)-support base. It presents a stable body of
  operational doctrine rooted in actual military experience and serves as a foundation for the development of
  Army Medicine proponent manuals on how the AHS supports unified land operations.
  The AHS mission falls within two warfighting functions- protection and sustainment. To clearly delineate
  the two AHS missions of force health protection (FHP) and health service support (HSS), this publication is
  divided into three parts- AHS overview, FHP, and HSS.
  Field Manual 4-02 consists of three parts and 12 chapters:
  Part One, AHS, provides a holistic view of the entire AHS and the complexities and interdependence of each
  medical function in successfully accomplishing the Army Medicine’s mission to conserve the fighting
  strength. This part of the manual describes and provides operational guidance on the AHS’s echelon above
  brigade headquarters, as well as the medical aspects of the law of land warfare.
  * Chapter 1 provides an overview of the AHS to include introduction information on tactical combat
  casualty care, global health engagement, and the AHS principles.
  * Chapter 2 discusses AHS command and control, overview of Army echelons, Army command and
  support relationships, the AHS Team and its primary tasks, medical command and control