Army · Combat support — law enforcement and security
31B Military Police VA Disability Claim Guide
Army 31B Military Police work spans garrison law enforcement, base security, convoy escort, and — for many post-9/11 soldiers — detainee operations in a combat zone. The physical toll of carrying a duty belt and body armor for entire shifts, sitting in a patrol vehicle for hours, and working rotating shift schedules is well documented in this occupation, but which of those applied to a given soldier depends heavily on assignment and era. This guide covers what the 31B record typically shows, what corroborates it, and where these claims commonly run into trouble.
Educational only. A military occupation is not presumptive evidence and does not establish service connection, a diagnosis, or a rating. Last updated 2026-09-06.
What 31B duty actually involved
MP duty alternates between vehicle patrol, foot patrol, static security posts, and — for deployed or detention-assigned units — direct supervision of detainees. A loaded duty belt (sidearm, magazines, restraints, baton, radio) worn over or alongside body armor puts sustained asymmetric load on the hips and lower back, and patrol work means long stretches sitting in a vehicle seat interrupted by rapid dismounts. Weapons qualification with the M9/M17 pistol and M4 carbine is recurring. Shift rotation — day, mid, and night rotations on a short cycle — is standard in both garrison MP companies and deployed security-force missions, and disrupts sleep architecture in a way that differs from a fixed-shift job.
- Wearing a loaded duty belt and body armor for full shift lengths, on foot or seated in a patrol vehicle
- Vehicle patrol with frequent rapid entry, exit, and pursuit driving
- Static and roving security-post duty, often standing for extended periods
- Weapons qualification and use-of-force training with sidearm and carbine
- Detainee operations in deployed assignments, including physical control techniques
- Rotating shift schedules with limited recovery time between rotations
- Response to physical altercations, vehicle accidents, and use-of-force incidents
Era and assignment note: Detainee-operations duty expanded sharply during the Iraq and Afghanistan era; garrison-focused 31B assignments before and after those deployments carry a different exposure profile than a mobilized MP company running a detention facility or convoy security mission.
What this occupation may help establish
Each item below supports the in-service event or exposure element only, and only when the veteran's own records back it up.
Duty-belt and body-armor load
Carrying a loaded duty belt over or under body armor for entire shifts is a defining feature of the MP job and is associated in occupational literature with hip, sacroiliac, and lumbar strain patterns distinct from infantry rucksack loading.
Records that corroborate it
- · Physical profiles (DA Form 3349) noting back, hip, or knee limitations
- · Sick-call and physical-therapy records from the assigned military treatment facility
- · NCOER and duty descriptions confirming daily patrol or gate-guard assignment
What it does not establish: Wearing the standard equipment load does not by itself establish that a specific joint or disc condition exists or that it originated in service; a current diagnosis and a link to that duty pattern are still required.
Weapons-range noise
Recurring pistol and carbine qualification and any use-of-force or breaching training exposes MPs to hazardous impulse noise, though less frequently than a crew-served-weapons MOS.
Records that corroborate it
- · Range qualification records and unit training schedules
- · Hearing-conservation audiograms (DD 2215/2216) if enrolled in a hearing-conservation program
- · Weapons card and duty assignment history
What it does not establish: Range attendance alone does not establish a current hearing-loss disability under 38 CFR § 3.385 or supply the medical nexus for tinnitus.
Detainee operations and use-of-force incidents
MPs assigned to detention facilities or security missions during deployment may be exposed to violent incidents, hostile detainee behavior, or witnessing casualties; this is assignment-dependent and not universal to the MOS.
Records that corroborate it
- · Deployment orders and unit assignment to a detention or security mission
- · Incident reports, use-of-force reviews, and line-of-duty determinations
- · Behavioral-health encounters during or after service
What it does not establish: An MP deployment does not by itself establish a qualifying PTSD stressor; the stressor must be described and, where feasible, corroborated, and a DSM-5 diagnosis is still required.
Shift work and sleep disruption
Rotating patrol and gate shifts, common in both garrison and deployed MP assignments, are associated in sleep-medicine literature with circadian disruption and higher rates of insomnia and sleep-disordered breathing complaints.
Records that corroborate it
- · Duty rosters and shift schedules showing rotation pattern
- · Sick-call entries describing fatigue or sleep complaints
- · Post-deployment health assessments (DD 2796/2900)
What it does not establish: A rotating-shift assignment does not itself diagnose a sleep disorder; a sleep study or clinical diagnosis and a nexus opinion are generally still needed.
Vehicle-seated patrol time
Extended seated patrol punctuated by rapid, sometimes forceful entry and exit is associated with lumbar and cervical strain, particularly over a multi-year patrol assignment.
Records that corroborate it
- · Patrol logs or duty descriptions confirming vehicle-based assignment
- · Vehicle accident reports if applicable
- · Chiropractic or physical-therapy referrals during service
What it does not establish: Patrol-vehicle duty alone does not establish a spine diagnosis or its cause; current imaging and a supporting opinion are still required.
Conditions that commonly arise from these duties
This is not a list of conditions to claim. It is a record-driven view of why the occupation may be relevant and what evidence VA looks at. Only you and your treating providers can identify what you actually have.
| Body system | Condition | Why the occupation matters | Evidence VA weighs |
|---|---|---|---|
| Lumbar/hip | Lumbar strain, sacroiliac dysfunction, degenerative disc disease | Sustained duty-belt load carried asymmetrically over years of patrol duty is a recognized mechanical stressor on the low back and hips. | Current imaging or examination findings, in-service profiles or sick-call records, and an opinion addressing cumulative belt-load mechanics. |
| Cervical spine | Cervical strain | Body armor and helmet weight combined with vehicle patrol posture can contribute to neck strain over a multi-year assignment. | Current diagnosis, treatment history, and lay statements describing onset during patrol duty. |
| Hearing | Tinnitus and hearing loss | Recurring pistol and carbine qualification exposes MPs to hazardous impulse noise. | Current tinnitus report or audiometry meeting 38 CFR § 3.385, plus range records and audiograms. |
| Sleep | Insomnia and sleep apnea | Rotating shift schedules disrupt circadian rhythm and are associated with higher rates of sleep complaints in shift-work populations. | A sleep study or clinical diagnosis, shift rosters showing the rotation pattern, and a nexus opinion addressing circadian disruption. |
| Mental health | PTSD, depression, and anxiety | Detainee operations, use-of-force incidents, and exposure to violence during deployment or high-tempo garrison duty can produce qualifying stressors. | A DSM-5 diagnosis, a described stressor with corroboration where feasible, and treatment records. |
| Knees | Degenerative arthritis, patellofemoral pain | Standing static-post duty and rapid vehicle dismounts under load are mechanical stressors on the knees. | Current diagnosis with range-of-motion findings and documentation of in-service onset. |
| Gastrointestinal | GERD and IBS | Irregular shift-based eating schedules and stress are associated in clinical literature with gastrointestinal symptom onset, though this connection is individual and requires medical support. | Current diagnosis, treatment records, and an opinion addressing the shift-work and stress factors. |
Your occupational claim profile
Tick what actually applied to your service. Nothing is stored or sent — this builds a records list you can copy and take to your provider or representative.
Records that corroborate an occupational history
- DD-214 (Member 4 copy) — Primary specialty, awards, badges, and deployment remarks.
- Complete service treatment records — Sick-call entries, profiles, and separation examination.
- Personnel file (OMPF / enlisted record brief) — Every assignment, duty code, and date you served in it.
- Hearing-conservation audiograms (DD 2215 / DD 2216) — Baseline and periodic tests document noise-hazardous duty and threshold shifts.
- Current medical records with a diagnosis — A current disability is required regardless of what the service record shows.
- A medical opinion connecting the condition to service — Occupational history supports the opinion; it does not replace it.
- Lay and buddy statements — Fill gaps where nothing was written down at the time.
- Military police blotter entries or incident reports — Document specific use-of-force or accident events.
- Shift rosters — Establish the rotating-shift pattern relevant to sleep-disorder claims.
An occupational history supports the in-service event or exposure element of a claim. It is not presumptive evidence, it does not diagnose anything, and it does not establish service connection on its own.
Why these claims get denied
Denial language tells you which element of the claim failed. These are the patterns that recur in decisions on 31B claims.
Belt-load back pain attributed to normal aging
Examiners sometimes attribute lumbar degeneration to age or body habitus without addressing years of asymmetric equipment load documented in duty records, which can make the opinion inadequate.
Sleep-disorder claim denied for lack of an in-service diagnosis
Shift-work sleep complaints were rarely formally diagnosed during service. Without a current sleep study and an opinion connecting shift-work history to the current diagnosis, VA denies these claims for insufficient nexus evidence.
PTSD stressor rejected as insufficiently specific
General descriptions of detainee-operations duty without a specific, dateable incident are more likely to be found insufficient. A concrete account of an event, with unit records or buddy statements where available, is generally needed.
Hearing claim denied despite range attendance
MPs qualify less frequently than infantry, and VA sometimes finds noise exposure less probable for this MOS absent range records or a hearing-conservation program enrollment.
Rating based on a single range-of-motion measurement
Service connection is granted for a spine or knee condition but the rating does not account for flare-ups tied to extended patrol shifts, contrary to 38 CFR §§ 4.40, 4.45.
VA accepted my exposure but still denied me
This is the most common outcome for occupational claims: VA concedes what the job involved, then denies on the medical link, the current-diagnosis element, or the rating criteria. A decision review looks at which element the decision actually turned on and what evidence would address it. Oakridge Claims focuses primarily on post-decision representation — Higher-Level Reviews, Supplemental Claims, and Board appeals — and also accepts initial claims and claims for increase based on case fit and current availability, at no fee for initial-claim representation.*
*No fee is charged for representation before VA issues an initial decision. If representation continues after an initial decision, fees may apply to eligible post-decision representation under a written VA-compliant fee agreement. See Fees for details.
31B claim questions
Does being an MP automatically qualify me for a back condition claim?
No. MP duty supports the in-service event or exposure element — the duty-belt and patrol load — but a current diagnosis and a medical opinion linking it to that load are still required.
I worked rotating shifts for years but was never diagnosed with a sleep disorder in service. Can I still claim it?
Yes, you can file, but you will generally need a current sleep study or clinical diagnosis and evidence — shift rosters, lay statements — connecting your shift-work history to that diagnosis.
Does detainee-operations duty automatically support a PTSD claim?
No. It can support the stressor element if you describe a specific incident, but a DSM-5 diagnosis and a link between that stressor and the diagnosis are still required under 38 CFR § 3.304(f).
I never went to a range as often as infantry did. Can I still claim tinnitus?
Yes. Range and qualification records establish your actual noise exposure regardless of MOS; a lower frequency of range time simply means the record should show what you did attend.
Can garrison-only MP duty support these claims, or does it need to be a deployment?
Garrison duty counts. Duty-belt load, patrol vehicle time, and shift rotation occur in both garrison and deployed assignments; deployment mainly affects the likelihood of detainee-operations or combat-stressor exposure.
What records show what I actually did as an MP?
Duty rosters and shift schedules, patrol logs, blotter or incident reports, NCOERs describing your assignment, weapons qualification records, and any line-of-duty determinations from incidents.
Related occupations
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VA accepted my exposure but still denied me
This is the most common outcome for occupational claims: VA concedes what the job involved, then denies on the medical link, the current-diagnosis element, or the rating criteria. A decision review looks at which element the decision actually turned on and what evidence would address it. Oakridge Claims focuses primarily on post-decision representation — Higher-Level Reviews, Supplemental Claims, and Board appeals — and also accepts initial claims and claims for increase based on case fit and current availability, at no fee for initial-claim representation.*
*No fee is charged for representation before VA issues an initial decision. If representation continues after an initial decision, fees may apply to eligible post-decision representation under a written VA-compliant fee agreement. See Fees for details.