The principal staff officer for all matters concerning training, operations and plans, and force development and modernization. An operations officer is located at every echelon from battalion through corps. The areas and activities that are the specific responsibility of the S3 are:
Supervising the command training program. Preparing and supervising the execution of training within the command. Preparing the training guidance for the commanders approval and signature. Assisting the commander in developing and training the units mission-essential task list (METL). Identifying training requirements, based on the units METL and training status. Ensuring that training requirements orient on conditions and standards of combat. Determining requirements for and allocation of training resources. Organizing and conducting internal schools and obtaining and allocating quotas for external schools. Planning and conducting training inspections, tests, and evaluations. Maintaining the unit-readiness status of each unit in the command. Compiling training records and reports as appropriate.
Operations and plans:
Preparing, coordinating, authenticating, publishing, and distributing the command SOP, OPLANs, OPORDs, fragmentary orders (FRAGOs), and warning orders (WARNOs) to which other staff sections contribute. Planning, coordinating, and supervising exercises. Participating in targeting meetings. Reviewing plans and orders of subordinate units. Synchronizing tactical operations with all staff sections. Reviewing entire OPLANs and OPORDs for synchronization and completeness. Monitoring the battle. Ensuring necessary combat support (CS) requirements are provided when and where required. Coordinating with the G5 on using tactical forces to establish civil government. Coordinating with the S2 to write the reconnaissance and surveillance annex, which includes tasking units with available assets, to collect the commanders priority intelligence requirements.
Recommending IR to the S2. Integrating fire support into all operations. Planning troop movement, including route selection, priority of movement, timing, providing of security, bivouacking, quartering, staging, and preparing of movement order. Recommending priorities for allocating critical command resources, such as, but not limited to Time (available planning time). Ammunition basic loads and the controlled supply rate (CSR) of ammunition. Personnel and equipment replacements. Electronic frequencies and secure key lists. Developing ammunition required supply rate (RSR) in coordination with the S2 and S4. Requisitioning replacement units through operational channels. Establishing criteria for reconstitution operations. Recommending use of resources to accomplish both maneuver and support, including resources required for deception purposes.
Coordinating and directing terrain management (overall ground manager). Determining combat service support (CSS) resource requirements in coordination with the S1 and S4. Participating in course of action and decision support template (DST) development with S2 and FSCOORD (fire spt coordinator). Coordinating with ENCOORD, S2, and surgeon to establish environmental vulnerability protection levels. Furnishing priorities for allocation of personnel and critical weapon systems replacement to combat units. Recommending the general locations of command posts. Recommending task organization and assigning missions to subordinate elements, which includes. Developing, maintaining, and revising the troop list.
Organizing and equipping units, including estimating the numbers and types of units to be organized and the priority for phasing in or replacing personnel and equipment. Assigning, attaching, and detaching units, detachments, or teams. Receiving units, detachments, or teams, including orienting, training, and reorganizing them as necessary. Coordinating with the S1 concerning civilian personnel involvement in tactical operations.
Force development and modernization:
Reviewing, analyzing, and recommending a planned or programmed force structure. Processing procedures for unit activation, inactivation, establishment, discontinuance, and reorganization (force accounting). Fielding new weapons and equipment systems (force modernization). Evaluating the organizational structure, functions, and workload of military and civilian personnel to ensure their proper use and requirements (manpower utilization and requirements). Allocating manpower resources to subordinate commands within established ceilings and guidance (manpower allocation). Developing and revising unit force data for documenting any changes to the MTOE and modification table of distribution and allowances (MTOA). Planning and conducting formal, on-site manpower and equipment surveys. Recording and reporting data for information, planning and programming, allocation, and justification (manpower reports). Ensuring MTDAand MTOEdocuments reflect the minimum-essential and most-economical equipment needed to accomplish the assigned mission. The S3 determines qualitative and quantitative personnel requirements for new equipment and systems.
Staff planning and supervision:
OPSEC, including analyzing the OPSEC posture of the command, determining essential elements of friendly information (EEFI) and OPSEC vulnerabilities, evaluating and planning countersurveillance operations and countermeasures, coordinating SIGSEC measures with the G6 (S6), conducting OPSEC surveys, and evaluating effectiveness of force-protection measures. Airspace command and control (AC 2 ). Information operations, to include C 2 W. Area damage control. Rear operations. Discipline, and law and order (coordinates with the S1 on administrative procedures dealing with discipline, law and order). Activation and deactivation of units. Mobilization and demobilization. Operations concerning EPWs and civilian internees, in coordination with the provost marshal.
Staff responsibility for Coordination:
Air defense coordinator (ADCOORD). Air liaison officer (ALO). Air/naval gunfire liaison company (ANGLICO) commander. Aviation coordinator (AVCOORD). Chemical officer (CHEMO). Deception officer. Electronic warfare officer (EWO). Engineer coordinator (ENCOORD). Explosive ordnance disposal (EOD) officer. Fire support coordinator (FSCOORD). Historian. Liaison officer (LNO). Provost marshal (PM). Psychological operations (PSYOP) officer. Safety officer. Special operations coordinator (SOCOORD). Theater airlift liaison officer (TALO). Performing logistics preparation of the battlefield in coordination with support command. Recommending IR to the S2. Recommending command policy for collection and disposal of excess property and salvage. Participating in targeting meetings.