MST Claims Updated July 2026 · By Marcus J. Webb

MST Behavioral Markers & Evidence Guide (38 CFR 3.304(f)(5))

A note before you read: This guide is written with care for survivors of all genders. Military sexual trauma (MST) affects servicemembers of every gender — and every survivor's path to benefits looks different. If you are in crisis or need to talk to someone, the Veterans Crisis Line is available 24/7: call or text 988, then press 1. You do not need to share your MST history to access MST-related VA health care and counseling.

Under 38 CFR § 3.304(f)(5), VA must consider behavioral markers as valid corroborating evidence for MST-related PTSD claims — even when no official report, criminal conviction, or disciplinary record exists. This provision exists because VA recognizes that military sexual trauma is profoundly underreported, and the absence of an official record cannot mean the absence of benefits. This guide explains every behavioral marker VA recognizes, what records and statements can document them, example lay statement language, and how to build a complete MST evidence file without requiring the survivor to produce an official report.

What Counts as MST Under VA Law

Military sexual trauma (MST) is defined by VA under 38 U.S.C. § 1720D as psychological trauma resulting from:

A single incident of sexual harassment that was threatening in character can qualify as MST. Harassment does not need to be persistent — it must be sufficiently serious and threatening to constitute a traumatic stressor.

MST includes assaults perpetrated by fellow servicemembers, superior officers, civilians on base, contractors, or anyone within the military environment. The perpetrator's gender does not matter. The survivor's gender does not matter. MST is recognized as a specific in-service stressor for VA disability purposes.

Who Can Claim MST-Related Benefits

Any veteran or servicemember — of any gender, sexual orientation, or military branch — who experienced sexual assault or threatening sexual harassment during military service may be eligible for MST-related VA disability benefits. You do not need to have reported the incident during service. You do not need a conviction. You do not need official documentation of the assault itself.

38 CFR § 3.304(f)(5): The Low Threshold Standard

The core regulation governing MST claims is 38 CFR § 3.304(f)(5), which reads in relevant part:

"If a post-traumatic stress disorder claim is based on in-service personal assault, evidence from sources other than the veteran's service records may corroborate the veteran's account of the stressor incident. Examples of such evidence include, but are not limited to: records from law enforcement authorities, rape crisis centers, mental health counseling centers, hospitals, or physicians; pregnancy tests or tests for sexually transmitted diseases; and statements from family members, roommates, fellow service members, or clergy."

The regulation then provides a specific list of behavioral markers that VA must consider:

"Evidence of behavioral changes following the claimed assault is one type of relevant evidence that may be found in these sources. Examples of behavioral changes that may constitute credible evidence of the stressor include, but are not limited to: a request for a transfer to another military duty assignment; deterioration in work performance; substance abuse; episodes of depression, panic attacks, or anxiety without an otherwise satisfactory explanation; or unexplained economic or social behavior changes."

Three critical words in this regulation: "not limited to." The behavioral markers listed are examples, not an exhaustive list. VA raters are required to consider any documented behavioral change that is consistent with having experienced a traumatic sexual event — even if it doesn't appear verbatim on the regulatory list.

Why the Absence of a Report Does Not End Your Claim

Military sexual trauma is among the most underreported violent crimes in any context. Within the military environment, underreporting is even more pronounced due to:

VA explicitly acknowledges this reality in 38 CFR § 3.304(f)(5). The regulation does not require an official report because requiring one would effectively deny benefits to the vast majority of MST survivors. VA policy instructs raters to apply a low threshold of corroboration for MST stressors — meaning credible behavioral evidence, even absent any official record, must be considered.

Credibility of Survivor Accounts

VA policy recognizes that a survivor's detailed, consistent account of their experience is itself evidence. The survivor is considered a competent witness to their own experience. Inconsistencies in memory are not automatically disqualifying — trauma impacts memory in documented ways, and VA examiners trained in MST are expected to understand this. If your memory of the event is fragmented or non-linear, that is a normal trauma response, not evidence that the event didn't happen.

The Complete Behavioral Markers List

The following is a comprehensive reference of behavioral markers VA recognizes as corroborating evidence for MST stressors. Each marker can appear in service records, medical records, personal statements, or lay statements from people who knew you during and after service.

Duty
Request for Transfer to Another Military Duty Assignment — A formal or informal request to change units, duty stations, or assignments during the timeframe of claimed MST. This is specifically listed in the regulation and is one of the strongest behavioral markers, as it reflects a documented desire to escape a specific environment or chain of command.
Work
Deterioration in Work Performance — A documented decline in duty performance, including negative performance evaluations, counseling statements, Article 15 proceedings (NJP), loss of rank, missed duty assignments, or supervisory complaints — particularly when this decline follows a relatively stable or positive prior performance record.
Substance
Onset or Increase of Substance Use — Beginning or significantly increasing alcohol or drug use following the period of claimed MST. This includes documented alcohol-related incidents during service, positive drug tests, substance abuse counseling referrals, or patterns of intoxication documented in medical or command records.
Mental Health
Episodes of Depression, Panic Attacks, or Anxiety Without Otherwise Satisfactory Explanation — Mental health symptoms documented during service that do not have an alternative medical explanation. This includes sick call visits for psychological symptoms, referrals to mental health, or diagnoses of anxiety or depression in service treatment records, particularly when the onset aligns with the claimed MST period.
Financial
Unexplained Financial Hardship — Sudden or unexplained changes in financial behavior — including allotment changes, inability to manage pay, debt accumulation, or emergency financial assistance requests — that were inconsistent with prior financial management, potentially reflecting coping behaviors or impaired functioning following trauma.
Social
Social Withdrawal and Isolation — Observable pulling back from unit social activities, recreational activities, or friendships that previously existed. Fellow servicemembers or family members may document noticing the veteran become withdrawn, reclusive, or unusually avoidant of social situations following the MST period.
Medical
Requests for STI Testing or Pregnancy Testing — Medical records showing a request for sexually transmitted infection screening or pregnancy testing — particularly when not part of routine healthcare — can corroborate that a sexual encounter (whether consensual or not) occurred. The regulation specifically mentions "pregnancy tests or tests for sexually transmitted diseases" as evidence.
Medical
Pregnancy Termination — Medical records reflecting a pregnancy termination during service, particularly when not preceded by documentation of a consensual relationship, may serve as corroborating evidence in context with other markers.
Medical
Injury or Treatment for Injuries Consistent with Sexual Assault — Medical treatment for injuries to areas of the body consistent with sexual assault — even when the stated reason for the visit differs — may be relevant. Medical providers are also potential lay witnesses about the nature of injuries observed.
Avoidance
Avoidance of Specific Locations, People, or Situations — Documented or observable avoidance of the location, shift, unit, or specific persons associated with the MST incident. This can manifest as unexplained requests to avoid certain duty assignments, repeated absences during specific overlaps with the alleged perpetrator, or documented refusals of certain tasks.
Sleep
Sleep Disturbances Documented During Service — Sick call visits or medical complaints related to insomnia, nightmares, or sleep disruption with onset or marked worsening following the claimed MST period.
Physical
Unexplained Physical Health Complaints — Repeated sick call visits or medical treatment for unexplained physical symptoms — headaches, gastrointestinal disturbances, chronic pain without identified cause — with onset following claimed MST. Somatic symptoms are a recognized response to trauma.
Leave
Requests for Emergency Leave or Leave Without Explanation — Requests for emergency or compassionate leave, or unexplained absences during the claimed MST period, that are inconsistent with the veteran's prior leave patterns.
Conduct
Disciplinary or Conduct Issues With No Prior History — Sudden conduct problems — including fights, insubordination, or other disciplinary actions — with no pre-MST record of such behavior. Command responses to trauma symptoms (disciplining behavior that is actually trauma-driven) create records that can corroborate the chronology of the MST.
Chaplain
Visits to Chaplain, Mental Health, or Counseling Services — Documented visits to a military chaplain, mental health professional, or counselor during service, even when the specific reason for the visit is not documented (due to privilege), establish that the veteran was seeking support during the relevant period.
Statements
Statements or Disclosures to Family or Friends During or Shortly After Service — Disclosures made to family members, close friends, or fellow servicemembers during or soon after service — even if not formally documented at the time — can be memorialized in lay statements submitted with the claim years later. These retrospective lay statements are specifically contemplated by the regulation.
Post-Svc
Post-Service Treatment for MST-Related Conditions — Mental health treatment sought after service discharge — particularly if the treating provider connects the condition to in-service trauma — is relevant evidence. Therapy records, PTSD treatment records, and mental health evaluations from after service can corroborate the in-service stressor.

Records That Document Behavioral Markers

Behavioral markers become evidence when they are documented. Here is where documentation of markers is typically found:

In Service Treatment Records (STRs)

In Personnel Records

In Post-Service Records

In Lay Statements

How to Request Your Service Records

Request your complete service treatment records and personnel file through the National Personnel Records Center (NPRC) via eVetRecs.archives.gov. Allow 60–90 days for processing. If your records were destroyed in the 1973 NPRC fire, VA will reconstruct records from alternative sources — this does not doom your claim. Your VSO or a VA-accredited attorney can assist with records requests.

Writing a Lay Statement: What to Include

A lay statement (also called a "buddy statement" or personal statement) is a written declaration from someone with relevant knowledge submitted to VA in support of a disability claim. For MST claims, lay statements are often the most important evidence available.

Who Can Write a Lay Statement

What a Lay Statement Doesn't Need to Include

A lay statement for MST does NOT need to describe the assault itself. The writer is documenting what they observed — behavioral changes, demeanor shifts, statements made — not the underlying event. This is a critical point: witnesses are not expected to have seen or known about the MST. They are documenting its aftermath.

What a Strong Lay Statement Does Include

Example Lay Statement Language

Example: Fellow Servicemember Lay Statement

"I served with [Veteran's name] in [Unit], [Location], from [dates]. We were in the same platoon and shared barracks. I am writing this statement to describe changes I observed in [Veteran's name] during our service together.

When [Veteran's name] first arrived to our unit, they were engaged, socialized regularly with other soldiers, and performed their duties consistently. Starting in approximately [month/year], I noticed a significant change. [Veteran's name] became withdrawn and stopped spending time with the group. They began avoiding common areas and often ate alone. I noticed they seemed anxious or startled easily when approached unexpectedly. Their performance in the motor pool — where they had previously been reliable — began suffering, and they received counseling from our sergeant around [approximate timeframe].

Around this time, [Veteran's name] told me that something had happened to them and they weren't ready to talk about it. I didn't push. I did observe that after this point, they avoided one specific sergeant in our unit and visibly became tense when that person was present.

I did not know the full details of what happened at the time. Looking back, the changes I observed were significant and lasting. The person I had known before that period was markedly different from the person who left our unit.

I declare under penalty of perjury that the foregoing is true and correct to the best of my recollection. [Signature, printed name, date, address]"

Example: Family Member Lay Statement

"I am the [relationship — mother/brother/spouse] of [Veteran's name] and am writing to describe changes I observed in them when they returned from [service period/deployment].

Before [Veteran's name] enlisted, they were [describe personality — outgoing, confident, social, etc.]. When they came home after [service dates], they were a different person. They did not want to discuss their service. They had significant difficulty sleeping — I could hear them from another room, and they mentioned nightmares on several occasions. They began drinking heavily shortly after their return, which was not consistent with their behavior before service.

[Veteran's name] eventually disclosed to me that something had happened to them during service that they were ashamed of and couldn't talk about. They said they had never reported it because they didn't think they would be believed. I am sharing this because [Veteran's name] deserves support, and what I observed in the changes they underwent was real and lasting.

I declare under penalty of perjury that the foregoing is true and correct to the best of my knowledge. [Signature, printed name, date, address, relationship to veteran]"

Example: Personal Statement (In the Veteran's Own Voice)

"I am submitting this personal statement in support of my claim for PTSD related to military sexual trauma that occurred during my service with [Unit] at [Location] in [timeframe].

I am describing what happened to me and the impact it had. [Describe the event or general circumstances in as much detail as you are comfortable with — you do not need to include graphic detail if it is retraumatizing to do so. Describe where you were, the general circumstances, and what occurred.] I did not report this at the time because [describe your reason — fear of retaliation, belief you wouldn't be believed, concern about career impact, shame, fear of the perpetrator, etc.].

After this happened, I [describe behavioral changes in your own words — requested a transfer, began having trouble sleeping, started drinking more, stopped socializing, had trouble with my performance, etc.]. These changes were directly connected to what I experienced. They were not present before.

I am aware that I cannot provide an official record of what happened because I did not report it. I am providing this personal statement, along with [list any other evidence you are providing], as the best evidence I have available. I am asking VA to apply the low threshold standard under 38 CFR 3.304(f)(5) and consider my account alongside the behavioral markers documented in my service records.

[Signature, date]"

Male MST: Recognized, Real, and Underrepresented

Male military sexual trauma deserves explicit acknowledgment in any MST guide, because male survivors face unique barriers that often compound the difficulty of accessing benefits.

The Numbers

VA's own data documents that while female veterans have higher per-capita rates of MST disclosure, male veterans represent the largest absolute number of MST survivors — because men have historically made up the vast majority of the military. Estimates from VA research suggest roughly 38% of male veterans who screen positive for MST experiences were male at the time of the assault.

Unique Barriers Male Survivors Face

VA's Policy on Male MST

VA's MST programs, free MST-related counseling, and MST-related disability claims process are explicitly available to all veterans regardless of gender. The MST coordinator at every VA medical center is trained to serve survivors of all genders. Male veterans can request a same-gender examiner at C&P exams. The evidentiary standards under 38 CFR § 3.304(f)(5) apply equally to all survivors.

To Male Survivors Reading This

What happened to you counts. It qualifies for VA benefits. You deserve care. The absence of a report, the presence of shame, or the years that have passed since service do not diminish your eligibility. VA's MST coordinator can connect you with confidential support — no formal claim or report is required to access MST-related counseling.

Your Rights at the MST C&P Exam

The C&P exam for MST-related PTSD is one of the most important and potentially most difficult parts of the claims process. You have specific rights:

Right to a Trauma-Informed Examiner

VA requires that MST-related PTSD C&P exams be conducted by examiners who have completed trauma-informed training. You can ask the examiner whether they have received MST-specific training. If you feel the examiner is not approaching the exam with appropriate sensitivity, you can note this in your records and raise it with your MST coordinator.

Right to Request a Same-Gender Examiner

You may request a same-gender examiner for your MST-related C&P exam. This request should be made when the exam is scheduled, ideally in writing. While VA will attempt to accommodate this request, it cannot always be guaranteed — but the request creates a record.

Right to Have a Support Person Present

You may have a support person (such as a VSO representative, VA patient advocate, or trusted person) present during the exam. However, this person should not speak on your behalf during the clinical portion — their role is support, not advocacy, during the examination itself.

What the Examiner Should NOT Do

If you feel the examiner did not comply with these standards, document the specific issues and report them to your MST coordinator or the VA Inspector General. A negative or poorly conducted C&P exam can be challenged through the appeals process.

VA MST Coordinators: A Vital Resource

Every VA medical center has a designated MST Coordinator — a trained staff member whose specific role is to assist MST survivors in accessing care, benefits, and support. MST Coordinators can:

You can find your local MST Coordinator by calling VA's main line (1-800-827-1000) or visiting VA.gov/health-care/health-needs-conditions/military-sexual-trauma/. Contacting an MST Coordinator does not automatically trigger a disability claim — you can access counseling and support without filing.

Support and Resources

You Are Not Alone

MST affects hundreds of thousands of veterans across every generation and every branch of service. You are not the only one. What happened to you was not your fault. Help is available without a claim, without a report, and without proving anything to anyone. When you're ready — whether that's now or later — VA benefits are there for you.

Crisis Resources

VA MST Resources

Benefits Assistance

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Related MST Resources

Editorial Standards: Written by Marcus J. Webb, veterans benefits researcher. Reviewed for trauma-informed language and clinical accuracy. Verified against 38 CFR § 3.304(f)(5) and current VA MST policy. Last reviewed: July 2026. Not legal advice — for representation, talk to a VA-accredited attorney.

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