01 / Occupational profile
Your 31B occupational profile
Duty-belt and body-armor load
Common occupational factor
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.
Weapons-range noise
Common occupational factor
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.
Detainee operations and use-of-force incidents
Assignment-dependent
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.
Shift work and sleep disruption
Common occupational factor
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.
Vehicle-seated patrol time
Common occupational factor
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.
02 / Your service
What did you actually do?
Your MOS is the starting point. Your actual assignment, era, equipment, location, and duties determine which parts of the occupational history are relevant. Use the Evidence Builder below to select your actual duties and see records that may corroborate them.
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.
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.
Duties that may vary by assignment
- 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
Related historical codes: 95B Military Police (former designation)
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Military Occupational Evidence Builder
Based on what you actually did in the military, what records might document it? Select only what applied to you. No name, file number, contact details, free text, or upload. Nothing is saved or sent.
Military service
Army · 31B Military Police
For another specialty, open its guide from the MOS library. A job code alone does not establish individual duties or exposure.
Era(s) of service
Deployments
Already have a VA decision?
Your Evidence Builder identifies records that may document your service history. If VA has already decided your claim, the next question is different: what did VA accept, what did VA reject, and why?
Request a free decision review03 / Corroboration
Building your occupational history
Records matter because they can connect a job title to an individual's actual work and circumstances.
Duty-belt and body-armor load
Records that may 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
Limit: 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
Records that may 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
Limit: 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
Records that may 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
Limit: 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
Records that may 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)
Limit: 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
Records that may corroborate it
- · Patrol logs or duty descriptions confirming vehicle-based assignment
- · Vehicle accident reports if applicable
- · Chiropractic or physical-therapy referrals during service
Limit: Patrol-vehicle duty alone does not establish a spine diagnosis or its cause; current imaging and a supporting opinion are still required.
04 / Evidence standard
What your MOS can — and cannot — establish
May help document
Work performed, circumstances of service, consistency of an alleged exposure, and the nature or duration of duties where supported by individual records.
Does not automatically establish
A diagnosis, medical causation, severity, percentage, presumption, or entitlement to service connection.
05 / Medical evidence
Conditions that may be relevant to the occupational history
This is not a list of conditions to claim. A veteran's actual diagnosis and individual service record determine relevance; occupational evidence is not medical causation.
Lumbar/hip +
Lumbar strain, sacroiliac dysfunction, degenerative disc disease
Why the occupation may matter: Sustained duty-belt load carried asymmetrically over years of patrol duty is a recognized mechanical stressor on the low back and hips.
Records and clinical evidence: Current imaging or examination findings, in-service profiles or sick-call records, and an opinion addressing cumulative belt-load mechanics.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Cervical spine +
Cervical strain
Why the occupation may matter: Body armor and helmet weight combined with vehicle patrol posture can contribute to neck strain over a multi-year assignment.
Records and clinical evidence: Current diagnosis, treatment history, and lay statements describing onset during patrol duty.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Hearing +
Tinnitus and hearing loss
Why the occupation may matter: Recurring pistol and carbine qualification exposes MPs to hazardous impulse noise.
Records and clinical evidence: Current tinnitus report or audiometry meeting 38 CFR § 3.385, plus range records and audiograms.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Sleep +
Insomnia and sleep apnea
Why the occupation may matter: Rotating shift schedules disrupt circadian rhythm and are associated with higher rates of sleep complaints in shift-work populations.
Records and clinical evidence: A sleep study or clinical diagnosis, shift rosters showing the rotation pattern, and a nexus opinion addressing circadian disruption.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Mental health +
PTSD, depression, and anxiety
Why the occupation may matter: Detainee operations, use-of-force incidents, and exposure to violence during deployment or high-tempo garrison duty can produce qualifying stressors.
Records and clinical evidence: A DSM-5 diagnosis, a described stressor with corroboration where feasible, and treatment records.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Knees +
Degenerative arthritis, patellofemoral pain
Why the occupation may matter: Standing static-post duty and rapid vehicle dismounts under load are mechanical stressors on the knees.
Records and clinical evidence: Current diagnosis with range-of-motion findings and documentation of in-service onset.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
Gastrointestinal +
GERD and IBS
Why the occupation may matter: 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.
Records and clinical evidence: Current diagnosis, treatment records, and an opinion addressing the shift-work and stress factors.
Occupational history alone does not establish this diagnosis or its medical relationship to service.
06 / Exposure record
ILER and toxic exposure
For applicable exposure-related claims, VA may review the Individual Longitudinal Exposure Record (ILER) and a toxic exposure risk activity (TERA) memorandum along with deployment and occupational records. An ILER entry does not automatically establish exposure or service connection.
07 / After a decision
Why a 31B claim may still be denied
An exposure finding is not the same as a grant. These are examples from the researched guide, not predictions about a particular case.
VA may accept
A duty or event consistent with the service record
But may deny
A diagnosis, medical relationship, or rating element
Record to examine
Decision findings, service and private treatment records, examination rationale, and medical opinions.
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.
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31B 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.
Sources and legal references
General education only; not legal or medical advice. Oakridge Claims is a private business, not affiliated with or endorsed by VA. Nothing here establishes a representative-client relationship or guarantees a result. Free accredited VSO help is available.