ATP 3-35.1 (FM 3-35.1), "Army Pre-Positioned Operations," provides doctrine for the Army pre-positioned stocks (APS) program. It describes the missions, duties, and responsibilities of all organizations involved in moving APS to an operational area and handing it off to designated Army units. It also describes planning and executing pre-positioned operations as well as supporting the combatant commander in a theater. The changing world environment has led to significant changes in how the Army structures its forces. No single solution will succeed when confronting an adaptive adversary. The Army must retain a wide range of capabilities while significantly improving its agility and versatility. Building a joint and expeditionary Army will require versatile forces that can execute smaller, shorter duration operations without degrading its traditional role in a major combat operation. At the core of this philosophy is having the ability to rapidly project predominately continental United States (CONUS)-based forces to an area of operations (AO), requiring the involvement of numerous military Services, agencies, departments, and organizations. Its credibility depends on the capability to deploy, in a timely manner, an appropriate military force capable of accomplishing the mission.