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13BE5

Cannon Crewmember

E-5 (Sergeant) · Army

E1–E3E-4E-5E-6E-7E8–E9
HEADS UP

E-5 Sergeant 13B is the first rank where the FA branch stops promoting you on points and starts promoting you on judgment. You are either the assistant section chief on a gun — the section chief's replacement when he is at sick call, at the BUB, or at the schoolhouse — or you are an NCO in the battery FDC running fire direction. You own monthly DA 4856 counselings on the soldiers under you, you write the first NCOER inputs, and you sign for the section's readiness piece you actually run. ALC packet starts now; the next institutional gates are SLC at Fort Sill and the Master Fires Sergeant Course conversation — the FA branch's senior NCO professional credential — at SFC and above.

The Honest MOS Read
Sergeant 13B is the rank where the section's training rhythm stops being something you participate in and starts being something you partly own. The section chief signs for the gun; the gunner lays the tube; but the SGT assistant section chief is the second-in-command on the howitzer — the soldier the section chief grooms to take the chief's seat in 24-36 months. Or, in some battery structures and at light-gun unit variants, the SGT may already be running a M119A3 light gun as the Section Chief from day one (the M119A3's smaller section composition lets a SGT chief take the seat in some IBCT FA battalions — verify the unit's table of organization with your platoon sergeant). Either way: the SGT 13B owns soldiers, owns a piece of the section's readiness, and answers to the section chief or platoon sergeant in language the BC reads at the next training meeting. As an assistant section chief on a typical M777A2, M109A6/A7 Paladin, or M119A3 firing-platoon section, the job content is the section chief's backup and the section's senior NCO supervisor on a defined slice — usually the gun's PMCS readiness, the ammo team's accountability, the cannoneers' training, or the section's vehicle and trailer fleet. You run pre-combat checks on the gun (cannon, breech, recoil cylinders, sight, fire control panel on the Paladin or the digital fire control suite on the M777A2 / M119A3), the ammo (projectile inventory, powder by lot, fuze settings, MACS modular accountability for 155mm), the comm (the section's radios, the CEOI fill, the comm-check up to the FDC and across to the platoon LT), and the laying reference (collimator, aiming circle, the survey aiming point if the section is laid by survey). You sign your name on the section's pre-fire safety-T card piece you are responsible for, every time, every live-fire. As an NCO in the battery Fire Direction Center, the job content is technical fire control. The FDC sits in the battery TOC or a dedicated FDC vehicle (the M577 / Stryker-based command vehicle / FDC HMMWV in light units, varies by BCT type) and converts the FO's call for fire into firing data the gun line can execute. The SGT FDC NCO runs the Backup Computer System (BCS) — the section's manual / mechanical backup for technical fire control — and reconciles against the digital fire control solution from AFATDS (the Advanced Field Artillery Tactical Data System — the FA's tactical-data-system spine, the targeting and fire-mission backbone the FDC and the BCT FSE run on). The SGT FDC NCO applies current MET (meteorological message) corrections to fire data, applies the MTO (Message to Observer) format back to the FO when adjustments are needed, validates the safety-T card and the surface danger zone for every mission, and supports the FDC chief (typically an SSG / E-7 NCO) and the FDO (Fire Direction Officer — a 13A LT in the battery). The promotion math to E-6 runs through AR 600-8-19's semi-centralized point system: 48 months TIS / 10 months TIG (waivable), DA Form 3355 promotion-point worksheet, max 800 points, monthly MOS-specific cutoff. ALC graduation is the STEP gate for SSG pin-on; the slot is allocated through the section chief and PSG to the FA NCO Academy at Fort Sill (the schoolhouse for FA-specific ALC). The cutoff scores move based on FA inventory and BCT readiness cycles; pull the current HRC SELCONT MILPER monthly before assuming the cutoff you heard last quarter is still the cutoff this quarter. The leadership content at SGT is what the section chief was not honest with you about as a cherry: you own soldiers now. Two to four cannoneers' careers and personal lives are partly in your hands. You write monthly DA 4856 counselings under ATP 6-22.1 — the legal-and-developmental contract between the NCO and the soldier, the documentation the chain leans on at the next Article 15 or chapter action. You write the first NCOER inputs (DA Form 2166-9 series under AR 623-3); your senior rater is your section chief or PSG. You counsel honestly — verbal counselings without a DA 4856 paper trail leave the section chief unable to defend you at the next 15-6 or chapter action. You read the section's cherry on PMCS, ammo handling, gun drill, and eye-and-ear discipline in language the cherry will repeat to the next cherry behind him. The school slots at SGT shift from BLC-prerequisite to ALC-and-beyond. ALC at Fort Sill is roughly 6-7 weeks (verify current POI; the FA branch has adjusted ALC length over the years) and is the STEP gate for SSG. Beyond ALC: the Master Fires Sergeant Course at Fort Sill — the FA branch's senior NCO professional credential, the visible differentiator at SFC and MSG slate, taken at SSG-and-up — is the long-range school conversation that opens at SGT. The 131A FA Targeting Technician warrant officer packet is now a real conversation if you have the technical depth (the section chief has commented on your AFATDS / digital fire control / targeting cell potential); the 13A OCS packet is the parallel commissioning path if you have the degree (or the Green-to-Gold path to get one). The first re-enlistment under SGT terms hits in this rank. The 13B SRB has moved cycle-to-cycle per the HRC SRB MILPER; pull the current message. SGT-rank zone math is different from SPC-rank zone math; the math may favor signing now or delaying 6-12 months. Run the math twice; talk to your spouse if you have one; if the re-up math does not work without the bonus, the re-up does not work.
Career Arc
  • 01BLC graduate + SGT pin-on (36 mo TIS / 8 mo TIG, waivable; chain recommendation; cutoff score).
  • 02First 90 days as SGT: section chief shifts you from cherry-track to assistant-section-chief-track or FDC-NCO-track.
  • 03First DA 4856 counseling cycle on your assigned cannoneers — the documentation chain starts.
  • 04Gunner qualification current; section-chief track open if you are on the gun line.
  • 05ALC packet built and submitted — STEP gate for SSG pin-on; FA NCO Academy at Fort Sill slot.
  • 06First NCOER as a rater (DA Form 2166-9 series under AR 623-3) — senior rater is your section chief or PSG.
  • 07First major live-fire / CTC rotation as a junior NCO (NTC, JRTC, JMRC) — section chief's read of you as ASC-track / FDC-NCO-track confirms.
  • 08Master Fires Sergeant Course conversation opens at SSG; 131A WO / 13A OCS packet conversation if technical depth or degree supports it.
Common Screwups
  • ×Counseling soldiers verbally. The NCO who cannot show a DA 4856 chain when the Article 15 hits has a section chief who cannot defend him.
  • ×Skipping the ALC packet at the first eligible window. The slot you turn down goes to a SGT in another section; the section chief's read closes.
  • ×Re-enlisting without reading the current HRC 13B SRB MILPER. SGT-rank zone math is different from SPC-rank zone math; the wrong contract terms (zone, MOS, additional-duty acceptance) lock you in.
  • ×Fraternization with a soldier under you on the section — AR 600-20 chapter 4 paragraph 14 violations end careers fast. The firing battery is small enough that the BC and the FA battalion CSM find out within a week.
  • ×DUI / Article 15 / financial mismanagement — the NCO file is small, and a UCMJ entry at SGT carries forward materially harder than at SPC. The chain has to write the SGT down on the NCOER and the senior rater reads it through the next 5 years of boards.

A Day in the Life

  • 0500Wake. PT uniform on. You are no longer the senior cannoneer the section chief lets run dry-fire; you are the SGT the section chief signs DA 4856 counselings alongside. Phone check for section emergencies — a cannoneer with a profile, a piece of kit at the arms room, a soldier with a personal situation that needs the SGT before the section chief.
  • 0530PT formation. Take accountability for the cannoneers in your assistant-section-chief slice. Section chief reports the section to the PSG. If the section chief is at the FA battalion BUB or sick call, you stand in for him at PT formation.
  • 0545-0700Battery PT. You run the warm-up for the section element under you. The section chief grades your PT leadership the way the senior rater will read it on the NCOER — voice command, form discipline, the cherry under you copying your form. Deadlifts, hex-bar carries, sandbag work — the heavy-lift PT cycle the section sustains.
  • 0700-0900Hygiene, breakfast, change into OCPs. You start meal-prepping on Sunday because your gym time is real and the ACFT 560+ standard is not optional.
  • 0900First formation. 1SG reads battery announcements. Section chief briefs the section. You stand at parade rest behind the section chief; you take notes on the section's tasks for the day.
  • 0915-1130Work call. Section dry-fire on the gun pad — you run the cannoneers through the load cycle script while the section chief grades you and the cherries. Gun PMCS at depth (the assistant section chief's PMCS is the section's PMCS), ammo handling at the consolidated trains, comm-check up to the FDC, prime mover or FAASV maintenance with the 91-series mechanics. Or you sit in the battery FDC running the BCS / AFATDS console under the FDC chief's eye if you are FDC-NCO-track.
  • 1130-1300Chow. SGT eats with the section if the section eats together; otherwise eats with the other SGTs in the platoon or the FDC NCO bench. Conversation drifts to the ALC packet, the next CTC rotation, the SRB MILPER, and the next SSG slate.
  • 1300-1500Afternoon work call. DA 4856 counseling session on a cannoneer (one a month minimum per ATP 6-22.1 / AR 623-3 cycle), NCOER input cycles, ALC packet review, school-packet build. If you are assistant section chief you may be running gunner-cycle prep with the section's gunner-track SPC; if you are FDC NCO you are running BCS / AFATDS console training with the cherries on the FDC bench.
  • 1500-1630Final formation. Section chief briefs the next day; you brief your assigned cannoneers on what they own for the morning. Sensitive items checked back in — the SGT signs alongside the section chief on the section's sensitive item ledger.
  • 1630Released. Sometimes. The SGT often stays to close DA 4856 counseling sessions, finish NCOER inputs, or work the next live-fire load plan with the ammo team chief.
  • 1700-2000Personal time. Gym (ACFT prep, lift-and-run cycles, ALC pre-school PT), study (TC 3-09.81 cover-to-cover, ATP 6-22.1, TC 7-22.7, AR 623-3), TA / CLEP / DSST for promotion points, family time. Married SGTs are home with family; single SGTs are in the gym or at the unit study room.
  • 2000-2200On the phone with a section cherry if one called — kit problem, ride to sick call, family situation. The SGT who answers the phone is the SGT the section chief trusts at FTX.
  • 2200Lights out. Tomorrow starts at 0500.
  • Field rotation / live-fire FTX / CTC rotationThe clock breaks. You stand the section's shift cycle alongside the section chief — typically 12-on / 12-off, sometimes 8-on / 16-off depending on the section composition. You are running the gun cycle on your shift; the section chief is running the gun cycle on his. The SGT who can run a clean gunner cycle and a clean ammo cycle at 0200 on hour 60 of a JRTC rotation is the SGT the section chief grooms for the section-chief seat.

Weekly Cadence

The Mon-Fri rhythm at SGT level is a layered cadence — the battery's training schedule, the section's training schedule, the SGT's counseling cycle, and the SGT's school-and-promotion packet cycle all running at the same time. Monday is heavy — PT, the section chief's brief on the week, gun PMCS at depth, the section's dry-fire prep on the gun pad, the morning's mandatory online courses (SHARP, EO, OPSEC, ATFP, cyber). Tuesday and Wednesday are Sergeant's Time Training (STT) days — you run the cherries through STP 6-13B task cards on load cycle, charge cut, fuze setting, misfire procedure, gun PMCS, eye-and-ear discipline. The section chief sits in the back and grades the SGT on the class delivery, not just on whether the cherries can do the task at the end. Thursday is typically motor pool / range / FDC day — gun depth-PMCS with the 91B or 91H mechanics, M4 sustainment, BCS / AFATDS console training in the FDC, or a section-level small-element live-fire on the unit range. Friday is the battery-level event (PT, hails-and-farewells, awards formation, safety stand-down, ATFP / OPSEC mandatory training) and release. The SGT's NCOER-defining work happens in the additional-duty cycle — the battery training NCO floor, the master-cannoneer or master-gunner candidate slot, the consolidated ammunition handling area floor at the battalion. These are billets that put the SGT in front of the BC, the 1SG, and the FA battalion CSM; the read those senior leaders develop of the SGT flows directly into the NCOER profile. The week's second rhythm is counseling, NCOER, and packet cycle. Monthly DA 4856 counselings on every soldier the SGT rates (typically 2-4 cannoneers under the assistant section chief, or 2-3 FDC operators under the FDC NCO) — ATP 6-22.1 is the doctrinal reference, AR 623-3 is the NCOER framework. The senior rater (section chief or PSG) reviews the SGT's counseling chain quarterly; the SGT who writes counselings honestly and on cadence is the SGT the senior rater can defend at the next promotion board. The ALC packet, the Master Fires Sergeant Course conversation, the 131A WO packet conversation, the 13A OCS packet conversation — these are quarterly conversations the SGT has with the section chief and the PSG. Field weeks, CTC train-ups (NTC, JRTC, JMRC), and the FA battalion home-station live-fire week collapse the rhythm — when the battalion is in train-up, garrison-time is for sleep and the family conversation about why you were not home for dinner three nights this week.

Key Skills — How to Drill Each

  1. 01
    Run a gun section through a complete fire mission cycle — receive, process, fire — at the ARTEP-MTP standard for your battery's METL.
    ARTEP-MTP (Army Training and Evaluation Program — Mission Training Plan) is the collective-task standard for the section. As the assistant section chief, you back up the section chief on every cycle: pre-combat checks on the gun and the ammo, the FDC's firing data received and verified, the gunner's lay confirmed against the aiming reference, the assistant gunner's quadrant verified, the cannoneer's load cycle supervised, the section's safety-T card signed. The section chief grades whether the cycle would have produced rounds on target on time, on the correct method of engagement, with the correct effects, against the correct danger close consideration. Drill the cycle dry every garrison week; run the live cycle every live-fire under the section chief's eye until the chief signs you off.
  2. 02
    Compute technical fire control on the BCS and reconcile against the digital fire control system; run a manual backup with the GFT (Graphical Firing Table), firing tables (TFTs), and MET application when the system fails.
    TC 3-09.81 Field Artillery Manual Cannon Gunnery and TC 3-09.8 Field Artillery Gunnery are the manuals; the FDC chief and the FDO are the SMEs. The Backup Computer System is the FDC's manual / mechanical reference for technical fire control — solved on the BCS, verified against the digital fire control solution that AFATDS produces, reconciled if the two diverge. The GFT (Graphical Firing Table) and the TFTs (Tabular Firing Tables) are the manual reference when the BCS itself fails. The MET application applies the current meteorological message (wind, temperature, density at altitude, the corrections the FDC pulls from the survey/MET section or the higher MET source) to fire data. The SGT FDC NCO who can run the manual backup is the SGT FDC NCO the FDC chief trusts when the digital architecture goes red at JRTC.
  3. 03
    Apply current MET (meteorological message) and MTO (Message to Observer) procedures to fire data — the difference between a clean mission and a 100m miss is whether the FDC NCO is running MET cleanly.
    MET is the meteorological correction applied to fire data; it comes from the FA battalion's survey/MET section or a higher MET source on a cadence (typically every 1-2 hours during active fires, depending on the conditions). The FDC NCO applies the current MET to every mission; the section's MET-staleness clock starts when the MET arrives. The MTO is the format the FDC sends back to the observer (the FO calling for fire) when an adjustment is needed — the message walks the FO through the round's effect and the correction the FDC is making. The SGT FDC NCO who maintains the MET clock, applies it cleanly, and runs MTO back to the FO in the format the FO will repeat is the FDC NCO the FA battalion S-3 trusts.
  4. 04
    Validate the safety-T card and surface danger zone for every live mission the section fires — sign your name on the readiness piece you own.
    The safety-T card is the section's pre-fire safety-check document — projectile, propellant, fuze, target location, SDZ (surface danger zone), MET, mission type. The SGT assistant section chief or FDC NCO signs the piece he validates; the section chief or FDC chief countersigns; the BC signs the battery-level safety-T release. Validation means checking each entry against the firing data and the SDZ chart, against the unit SOP and the range safety briefing, and against the mission's RED (risk-estimate distance) for danger close. The SGT who signs the card without validating is the SGT whose name is on the AAR slide when the round goes long; the SGT who validates cleanly is the SGT the section chief and BC trust.
  5. 05
    Write a legally defensible DA 4856 on a soldier who is sliding, with a measurable Plan of Action signed before he leaves the office.
    ATP 6-22.1 The Counseling Process is the doctrinal reference; AR 600-20 (Command Policy) and AR 27-10 (Military Justice) frame the legal posture. A good DA 4856 has the specific behavior named, the standard cited (the AR, the SOP, the section's published expectation), the consequence stated, and a Plan of Action with measurable, time-bound milestones the soldier signs. The NCO chain (section chief, PSG, 1SG) needs to see the document chain when the next Article 15 or chapter action triggers — verbal counselings leave the chain undefended. The SGT who counsels cleanly is the SGT the section chief defends.
  6. 06
    Counsel a cherry cannoneer on PMCS, gun drill, ammo handling, and eye-and-ear discipline in language the soldier will repeat to the next cherry behind him.
    Counseling is part NCOER documentation and part section culture transmission. The SGT who can explain why eye and ear pro are not optional in language the cherry will repeat is the SGT whose section's safety culture survives a personnel turnover. Use the section's published SOP, the howitzer TM, TC 3-09.81, and the unit's safety briefing language as your reference; do not invent the standard, cite it. The cherry who hears the standard from the SGT in the same language he hears it from the section chief and the 1SG carries the standard into the next live-fire.

Manuals & References — What Chapters Matter

  • TC 3-09.81 — Field Artillery Manual Cannon Gunnery
    Own this manual cover-to-cover. The gunnery side (deflection, quadrant, fire control tables), the propellant and fuze tables, the misfire procedure, the danger-close RED values by caliber and shell-fuze combination — every page is something the SGT either supervises or signs against. The section chief and the FDC chief quote it verbatim and the answer to their question is on the page they are quoting.
  • TC 3-09.8 — Field Artillery Gunnery
    The companion to TC 3-09.81 on the FDC architecture side. Technical fire control, BCS operation, MET application, the FDC's tactical fire control architecture. Read it cover-to-cover if you are FDC-NCO-track; read the architecture chapters if you are assistant-section-chief-track.
  • ATP 3-09.50 — The Field Artillery Cannon Battery
    The battery-level doctrine the BC and the 1SG run the unit off. The section composition, the battery emplacement and displacement, the battery command and control, the battery safety procedures. Read the chapters that map to your seat — assistant section chief or FDC NCO.
  • FM 3-09 — Field Artillery Operations; ATP 3-09 — Fires
    The umbrella doctrinal manuals for the entire fires warfighting function. The SGT who understands how the FA battalion plugs into the BCT and the joint fires architecture briefs section readiness in language the BC and the FA BN S-3 will repeat. Skim FM 3-09; own the chapters on the FA battalion in the BCT.
  • STP 6-13B — Soldier's Manual, MOS 13B; AR 600-20 — Army Command Policy; ATP 6-22.1 — The Counseling Process
    STP 6-13B is the MOS task list — at SGT you are signing soldiers off, not just running them. AR 600-20 is the chain-of-command and the discipline framework you operate inside. ATP 6-22.1 is the counseling process — the DA 4856 documentation is the contract you write, sign, and defend.
  • TC 7-22.7 — Army NCO Guide; AR 623-3 — Evaluation Reporting System
    TC 7-22.7 is the NCO's role manual. AR 623-3 is the NCOER (Noncommissioned Officer Evaluation Report) doctrine — the DA Form 2166-9 series, the senior-rater process, the rater-and-rated-NCO relationship. You write NCOER inputs at SGT for the first time; the senior rater reads the document for the next 5 years of boards.

Standards — How to Hit Each

  • BLC graduate (required); ALC packet built for the next slot window.
    BLC was the SGT pin-on STEP gate. ALC is the SSG pin-on STEP gate — taken at the FA NCO Academy at Fort Sill, roughly 6-7 weeks of FA-specific senior leader development (verify current POI). Build the ALC packet 6-12 months after pinning SGT; submit through your section chief, PSG, and the battery training NCO to ATRRS. The SGT who has the ALC slot locked in by month 12 of SGT is the SGT who pins SSG first.
  • Gunner qualification current; section-chief track open — your section chief is grooming you for the chief seat at the next slate.
    Keep the gunner qualification current through the section's cycle of dry-fire and live-fire — the section chief signs your training record card each cycle. The section chief reads your gunner-seat performance against the section-chief standard from your first SGT day; the soldier who runs the gun cleanly at the assistant section chief seat is the soldier who takes the section chief seat 24-36 months later. On a M119A3 in some IBCT FA battalions, the SGT may already be the section chief — own the seat fully under the platoon sergeant's eye.
  • ACFT 560+ as a floor — 13B NCOs lift heavy ammo and the section measures.
    560 is above battery average for SGT-and-up. The strength volume that built the 540+ score at SPC carries into the 560+ score at SGT — deadlifts, hex-bar carries, the standing power throw, the 2MR. Personal PT after hours sustains the score; section PT alone is not enough. The SGT whose ACFT is the section's high score sets the example the cherries will copy; the SGT whose ACFT is the section's low score is the SGT the cherries write off.
  • Section / FDC certified at ARTEP-MTP 'T' rating on the fire-mission collective tasks the battery METL calls for.
    ARTEP-MTP rating is the collective-task standard — T (Trained), P (Practiced), U (Untrained). The section / FDC certified at 'T' on the battery METL fire-mission collective tasks is the section / FDC the BC defends at the FA battalion training meeting. Drill the tasks dry on garrison weeks; run them live on field weeks; the section chief or FDC chief grades the rating each cycle. Push for the 'T' rating; do not coast at 'P.'
  • Promotion-points stacked: weapons quals, schools (Air Assault, Airborne, driver / wrecker, FDC, the early Master Fires Sergeant conversation), CLEP/DSST/TA, correspondence / SSD — the worksheet is reviewed quarterly.
    DA Form 3355 promotion-point worksheet under AR 600-8-19, max 800 points for SSG. The ceilings per category are the same shape as SPC (weapons, college credit, awards, structured self-development) but the bench is harder — every SGT in the FA battalion is grinding the same worksheet. Review with your section chief or PSG quarterly; do not let the points drift unaddressed. The SGT who hits the SSG cutoff on the first eligible cycle is the SGT who built the worksheet with intent at SPC and sustained it at SGT.

Technical Mistakes — Concrete Consequences

  • Counseling soldiers verbally.
    The NCO who cannot show a DA 4856 chain when the Article 15 hits has a section chief who cannot defend him. The chain reads the missing documentation as the SGT's failure to do the documentation work the NCO seat exists to do. The next chapter action, separation board, or appeal goes against the section because the SGT did not write the counseling. The SGT's NCOER reflects it; the senior rater's narrative writes it down.
  • Running a mission with the cherry on the lay without supervising the verification.
    A bad lay from your gun is your call on the AAR slide. The section chief signed for the gun; the SGT signed for the mission cycle on his shift; the cherry's mistake is the SGT's failure to verify. The round goes long, short, or off the SDZ, the battery stands down for a 15-6 investigation, and the SGT's name is in the BC's office.
  • Skipping the MET / MTO update on a long-range mission.
    The round lands long or short; the FDC chief and the BC are in your AAR. MET-staleness is the silent killer of long-range fire missions — the MET that was current 2 hours ago is not current now. The SGT FDC NCO who maintains the MET clock is the SGT FDC NCO the FA BN S-3 trusts; the SGT who lets the clock run is the SGT the FDC chief takes off the console at the next CTC rotation.
  • Letting the gun's sensitive-item accountability slide — sight, collimator, breech tools, comm fill devices.
    Property loss at NCO level eats the battery schedule and your NCOER. The section chief signed for the gun; the SGT signed for the section's sensitive items on his shift; a missing serial number triggers a 15-6 investigation, a Commander's Inquiry, and a permanent line in the file. The SGT whose accountability slid is the SGT the BC writes down on the next NCOER and the senior rater reads through the next 5 years of boards.
  • Going around the section chief to make a point to the FDO or the BC.
    Battery first sergeant finds out within a week. The NCO chain runs through the section chief, the PSG, the 1SG, and the FA battalion CSM in that order; the SGT who jumps the chain to make a point breaks the read the chain has of him as a trustworthy NCO. The next NCOER reflects it; the next ALC packet conversation reflects it; the next school slot does not drop for him.

Career Decisions at This Rank

  • ALC packet timing (the STEP gate to SSG).
    ALC at Fort Sill is the SSG pin-on STEP gate, taken at the FA NCO Academy (~6-7 weeks; verify current POI). Slot windows: the Academy pins classes on a regular cycle; the FA battalion competes with the rest of the FA force for the seats. The decision is whether to push for the earliest slot after SGT pin-on (gets you on the SSG board fast, but risks ALC overlap with a deployment, JRTC/NTC rotation, or section turnover) or wait for a quieter quarter. Talk to the section chief and the PSG about the battalion's deployment cycle before locking the slot. The SGT who waits past the first eligible window is the SGT whose section chief now reads him as the soldier who avoided the schoolhouse.
  • Section-chief-track vs. FDC-NCO-track at SGT.
    Both tracks pin SSG and SFC on a working slate. The section-chief track keeps you on the gun line — assistant section chief at SGT, section chief at SSG, platoon sergeant track at SFC, firing battery 1SG track at MSG. The FDC-NCO track puts you in the technical fire control side — FDC NCO at SGT, senior FDC NCO at SSG, FDC chief track at SFC, the FA battalion fire-direction senior NCO track at MSG and beyond. Both tracks are real careers; the technical depth and the leadership-content shift differently. Section-chief track is heavier on section-level command and gun-line leadership; FDC-NCO track is heavier on technical fire control and AFATDS / BCS / MET mastery. Talk to a current SSG section chief and a current SSG FDC chief; ask the PSG which track the section sees you on.
  • 131A FA Targeting Technician Warrant Officer packet.
    131A is the FA's technical-track warrant officer specialty — the targeting cell senior technical leader, the AFATDS / fire-mission / FSCM-management SME at the BCT FSE and the FA battalion targeting cell. The packet runs through the section chief's recommendation, the PSG, the 1SG, the BC, and ultimately the FA battalion CSM and the WOST (Warrant Officer Selection Team) at HRC. The packet requires an NCOER profile that reads to the WOST as technical-depth-and-leadership-balance, a clean military record, and a strong endorsement from the FA battalion commander or above. The conversation starts at SGT for the technically strong; the actual packet typically goes in at SGT or early SSG. The payoff: WO career path with no further enlisted-NCO board competition, a different command-relationship to the FA battalion's targeting and fires architecture, and a different long-term post-service civilian conversation. Talk to a current 131A in the FA battalion targeting cell or at the BCT FSE; pull the current HRC 131A MILPER for the application requirements.
  • 13A OCS packet (Green-to-Gold or direct OCS at Fort Moore).
    13A is the FA branch's officer specialty. The path is either direct OCS (12-week course at Fort Moore — renamed from Fort Benning in 2023 — for soldiers with a bachelor's degree already), or Green-to-Gold for active-duty soldiers who need the degree first (the program funds an ROTC scholarship at a partner university). The 13A career arc differs materially from the 13B enlisted/NCO arc — platoon leader (FA battery firing-platoon LT) at LT, battery commander at CPT, battalion S-3 / FSO / battery commander track, brigade fires officer track, FA battalion commander at LTC, FA brigade or DIVARTY commander at COL. The decision at SGT is whether the leadership content the section chief, PSG, and 1SG have seen in the SGT reads to commissioning standard, and whether the SGT wants to lead at the battery and battalion level (officer track) or stay close to the section and the gun line (NCO track). Talk to a current 13A LT in the FA battalion; talk to the BC about the packet timing.
  • Re-enlistment under SGT terms; SRB math at the SGT zone.
    The SGT re-enlistment window opens at the SGT zone of consideration. The 13B SRB has moved cycle-to-cycle per the HRC SRB MILPER; SGT-rank zone math is different from SPC-rank zone math. The trap: signing the re-up at SGT without reading the current MILPER locks the SGT into terms (zone, MOS, additional-duty acceptance) that may not match the SGT's actual career arc. Pull the current MILPER; run the math twice; talk to the spouse if there is one; talk to the career counselor about the SGT-specific zone options. If the re-up math does not work without the bonus, the re-up does not work.

How the Seat Varies by Unit Type

  • IBCT FA battalion SGT — M119A3 105mm light howitzer (10th MTN, 25th ID, 101st AAB, 173rd, 82nd ABN)
    The SGT on the M119A3 may already be running the section as the Section Chief in some IBCT FA battalions (the M119A3's smaller section composition lets a SGT chief take the seat in some structures — verify the unit's table of organization). If the SGT is the section chief, the leadership content is full ownership of the gun, the cannoneers, and the section's training, NCOER, and counseling cycle. If the SGT is the assistant section chief under an E-6 section chief, the leadership content is the section chief's backup and the section's senior NCO supervisor on a defined slice. JRTC at Fort Johnson is the home CTC; the FA battalion's airborne or air-assault op rotation is the institutional rhythm. The community values mobility, foot-mobile competence, and the SGT who can run a clean gun cycle while the section is hung from a CH-47.
  • SBCT FA battalion SGT — M777A2 155mm towed (2nd Cav, 2/2 ID JBLM, 1/25 ID Alaska, 3/2 ID JBLM)
    The Stryker FA SGT is the assistant section chief on the M777A2 — the senior NCO under the SSG section chief on a 7-9 soldier 155mm towed-gun section. The section's rhythm is the Stryker company's mounted-dismounted pace; the M777A2 emplaces and displaces more often than the M119A3 sections do. NTC and JMRC are the home rotations. The SGT who masters the M777A2's digital fire control suite and the section's emplace / displace cycle is the SGT the section chief grooms for the next section-chief seat at SSG.
  • ABCT FA battalion SGT — M109A6 Paladin / M109A7 PIM 155mm self-propelled (1AD, 1ID, 3ID, 4ID, 1CD)
    The ABCT SGT is the assistant section chief on a Paladin section — the senior NCO under the SSG section chief on a tracked self-propelled 155mm crew. Paladin sections are tighter (fewer cannoneers than a M777A2 section, more vehicle-and-fire-control reliance); the SGT who masters the Paladin's digital fire control panel and the FAASV-to-gun ammo flow is the SGT the section chief grooms for the section-chief seat. NTC at Fort Irwin is the home rotation; the gunnery cycle is the institutional rhythm. The community values precision in technical fire control, fire control panel mastery, and the SGT who can run the panel AND the manual lay as backup.
  • Battery FDC SGT — Fire Direction Center NCO in any BCT FA battalion (the parallel SGT track to assistant section chief)
    The FDC SGT sits in the battery TOC or the FDC vehicle and runs the BCS / AFATDS / MET workflow under the FDC chief (SSG E-6) and the FDO (13A LT). The seat is technical fire control — solving the gunnery problem on the FDC side, validating the safety-T card, applying MET and MTO to fire data, processing the FO's call for fire into firing data the gun line can execute. The SGT FDC NCO who masters the AFATDS console and the BCS manual backup is the SGT the FDC chief grooms for the FDC chief seat at SSG and the FA battalion fire-direction senior NCO track beyond.
  • DIVARTY HHB / FA Brigade HHB SGT (a small fraction of 13B SGTs)
    13B SGTs in DIVARTY or FA brigade HHB pull staff-floor billets — battalion / brigade training NCO floor, S-3 NCO floor, the battalion / brigade ammunition planning cell floor, the master gunner candidate slot (the senior technical FA NCO track that feeds the Master Fires Sergeant Course at SSG). The seat trades section-line credibility for staff visibility; the senior NCO chain (FA battalion CSM, FA brigade CSM, DIVARTY senior NCO) gets a longer look at the SGT. The path back to a firing battery is the standard rotation; the SGT who lands in DIVARTY / FA brigade HHB asks the FA battalion CSM about the path back into a section-chief seat before re-enlistment.

What Good Looks Like at This Rank

The good 13B Sergeant runs a section or an FDC slot whose fire-mission discipline, ammo handling, and live-fire AAR readout make the BC and 1SG ask the PSG if they can keep this NCO at the section for one more rotation cycle. His cannoneers pass section drills cold on every collective task in the battery METL; his gun's PMCS is the battery reference; his ammo accountability is clean; his comm-check posture up to the FDC is the section's standard. He writes monthly DA 4856 counselings under ATP 6-22.1, signs them with his soldier in the office, and the chain has the documentation when the next Article 15 or chapter action triggers. The good assistant section chief is the SGT the section chief lets run the gun at 0200 because the section chief knows the lay will be right, the load cycle will be clean, the safety-T card will be validated, and the section chief can sleep on a CTC rotation knowing his SGT is on the line. The good FDC NCO is the SGT the FDC chief trusts on the BCS and the AFATDS console because the section's missions come out on time, with the right method of engagement, with MET-current solutions and SDZ-validated safety-T cards. Either seat: the section chief or FDC chief writes the NCOER bullets off measurable section outputs (first-round time, mission completion rate at the last live-fire, ARTEP-MTP rating, sensitive-item accountability across the section, NCOER inputs the SGT wrote on his soldiers). ALC packet is built; the next FDC course / driver-wrecker / Air Assault / Airborne school slot is on the table; the PSG is naming the SGT on the bench for the next SSG slate. The section chief is mentioning the SGT in the same sentence as the next section-chief seat that opens. The Master Fires Sergeant Course conversation is starting to surface at the platoon-sergeant level. The 131A FA Targeting Technician warrant officer packet is on the table for the technically strong; the 13A OCS packet is on the table for the degreed and leader-track inclined. The career-defining decisions of the next 5 years are now in front of the SGT, and the section chief and PSG are reading the SGT against each.

Preview — The Next Rank

E-6 Staff Sergeant 13B is the next gate, and it is structurally tighter than the SGT gate. The promotion math is the same DA 3355 worksheet under AR 600-8-19 — 48 months TIS / 10 months TIG (waivable), max 800 points, monthly MOS-specific cutoff — but the chain of command's recommendation carries materially more weight, and the Army's E-6 inventory math is structurally tighter than the E-5 inventory math because the SSG slate funds the section chief billets and the FDC chief billets across the FA force. ALC at Fort Sill is the STEP gate for SSG pin-on. Pull the current HRC cutoff message monthly. The job content at E-6 is Section Chief — the seat the FA enlisted force is built around. You run a 7-9 soldier howitzer section (gunner, assistant gunner, ammo team chief, cannoneers, and the prime mover crew on towed; the Paladin crew and FAASV crew in ABCT; the M119A3 section in IBCT). You sign for the howitzer (M777A2, M109A6/A7 Paladin, or M119A3) and every piece of fire control on it. You build section training, conduct quarterly counselings, defend your section in the battery training brief, and translate the BC's commander's intent into a section that can shoot the first round inside the time standard from the FDC's call. Alternative SSG seat: FDC chief in the battery FDC — the senior NCO inside the FDC under the FDO, running technical fire control end-to-end. Both seats sign for hundreds of thousands of dollars in fire control, fuze, propellant, and projectile inventory; both seats write three to five NCOERs per cycle. The differentiator on the SFC board four years later is the school-slot stack you built at SGT and SSG (ALC complete, the Master Fires Sergeant Course at Fort Sill — the FA branch's senior NCO professional credential — taken at SSG-and-up, Air Assault / Airborne if unit-coded, the FDC track schools if FDC-NCO-track), the visible section-chief or FDC-chief performance in your first 12-18 months as SSG, and the NCOER profile your senior rater builds. Plan the ALC packet 6-12 months before pinning SSG; plan the Master Fires Sergeant Course conversation 12-18 months after pinning SSG; SLC packet 18-24 months after that. The next career-defining conversation is the 131A WO packet (if the technical depth supports it), the 13A OCS packet (if the degree and leadership content support it), the FA Drill Sergeant or Recruiter SDA conversation, or the first 1SG-pool conversation if you stay enlisted and run the firing-battery 1SG track.
FAQ

13B E5 — Frequently Asked Questions

Q01What does a E5 13B (Cannon Crewmember) actually do?
As an assistant section chief, you back up the section chief on every fire mission — pre-combat checks on the gun, ammo, fuze, propellant, comm, and laying reference; you run the section when the chief is in the TOC or on leave.
Q02What's the most important thing to know as a E5 13B?
E-5 Sergeant 13B is the first rank where the FA branch stops promoting you on points and starts promoting you on judgment.
Q03What does a typical day look like for a E5 13B?
Time-blocked day at the E5 13B rank tier: 0500 Wake. PT uniform on. You are no longer the senior cannoneer the section chief lets run dry-fire; you are the SGT the section chief signs DA 4856 counselings alongside. Phone check for section emergencies — a cannoneer with a profile, a piece of kit at the arms room, a soldier with a personal situation that needs the SGT before the section chief, 0530 PT formation. Take accountability for the cannoneers in your assistant-section-chief slice. Section chief reports the section to the PSG.…
Q04What mistakes get E5 13B soldiers fired or relieved?
Counseling soldiers verbally. The NCO who cannot show a DA 4856 chain when the Article 15 hits has a section chief who cannot defend him; Skipping the ALC packet at the first eligible window. The slot you turn down goes to a SGT in another section; the section chief's read closes; Re-enlisting without reading the current HRC 13B SRB MILPER. SGT-rank zone math is different from SPC-rank zone math; the wrong contract terms (zone, MOS, additional-duty acceptance) lock you in
Q05What career decisions matter most at the E5 13B rank tier?
ALC packet timing (the STEP gate to SSG) — ALC at Fort Sill is the SSG pin-on STEP gate, taken at the FA NCO Academy (~6-7 weeks; verify current POI). Slot windows: the Academy pins classes on a regular cycle; the FA battalion competes with the rest of the FA force for the seats. The decision is whether to push for the earliest slot after SGT pin-on (gets you on the SSG board fast, but risks ALC overlap with a deployment, JRTC/NTC rotation, or section turnover) or wait for a quieter quarter. Talk to the section chief and the PSG about the battalion's deployment cycle before locking the slot.…
Q06What's next after E5 for a 13B (Cannon Crewmember) in the Army?
E-6 Staff Sergeant 13B is the next gate, and it is structurally tighter than the SGT gate.
Q07What manuals and regulations does a E5 13B need to know cold?
TC 3-09.81 — Field Artillery Manual Cannon Gunnery (own this manual cover-to-cover).; TC 3-09.8 — Field Artillery Gunnery.; ATP 3-09.50 — The Field Artillery Cannon Battery.

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Published by the Honest MOS Editorial DeskVerified against DoD/.gov sourcesUpdated May 2026Editorial standards