This publication, Army Techniques Publication ATP 4-02.43 Army Health System Support to Army Special Operations Forces December 2015, remains generally consistent with FM 4-02.43 on key topics while adopting updated terminology and concepts, as necessary. Army Health System support to ARSOF is challenging in that ARSOF are lightly equipped with limited organic support assets. Therefore, they must be self-sustaining in all areas of medical care throughout the range of military operations. Since they routinely operate in undeveloped joint operational areas without established support systems, ARSOF medical personnel must assume both AHS missions of health service support (HSS) and force health protection (FHP) responsibilities. Army Techniques Publication 4-02.43 contains the following six chapters and three appendixes: Chapter 1 provides an overview of AHS support and its mission to provide health care to Soldiers across the range of military operations. It identifies and discusses the purpose of the AHS, reviews the roles of medical care and the AHS principles. Chapter 2 discusses the missions and activities of ARSOF. It also examines ARSOF medical capabilities and the range of medical personnel and their responsibilities serving in ARSOF. Chapter 3 lists the AMEDD medical functions and their relationship to ARSOF. In addition, there is a comparison of AHS support between conventional forces and ARSOF. Chapter 4 discusses planning for AHS support to ARSOF. It focuses upon planning requirements for a number of core activities. Chapter 5 focuses upon AHS support to ARSOF in joint operations and the various considerations involved in joint task force (JTF) planning. Chapter 6 examines medical logistics (MEDLOG) support to ARSOF and its unique requirements. Appendix A provides an explanation of the law of war, which includes the Geneva Conventions, and the protections afforded to conventional medical personnel, medical aircraft, and medical materiel. Appendix B discusses medical evacuation planning in the support of ARSOF missions and units. Appendix C discusses the relationship between special operations (SO) mission command in the joint environment.