Desertion is one of the most serious absence offenses in military law, and service members who are navigating medical separation often wonder whether starting that process shields them from a desertion charge. The concern is understandable. A member who is sick or injured, undergoing evaluation, and uncertain about their future may believe that the medical process puts their status in a kind of protected limbo. The reality is that beginning medical separation proceedings does not, by itself, prevent a desertion charge. A service member remains subject to the Uniform Code of Military Justice throughout the disability evaluation process, and an unauthorized absence formed with the required intent can still be charged. At the same time, the medical context can be highly relevant to whether the government can actually prove the offense.
What desertion under Article 85 requires
Desertion is defined in Article 85 of the Uniform Code of Military Justice (10 U.S.C. 885). It comes in more than one form, but the most familiar is desertion with intent to remain away permanently. To prove this, the government must show that the accused absented themselves from their unit or place of duty and that they intended to remain away permanently. Other forms include desertion with intent to avoid hazardous duty or to shirk important service, and desertion by surrender to or attempt to join the enemy.
The defining feature of desertion is the specific intent. This is what separates it from the lesser offense of absence without leave under Article 86 (10 U.S.C. 886). Absence without leave requires only that the absence was unauthorized. Desertion requires that additional mental state, such as the intent to stay away for good. A member can be absent for a long time and still lack the intent that desertion demands. Length of absence may serve as circumstantial evidence from which a factfinder could infer intent, but the passage of time does not automatically transform an unauthorized absence into desertion.
Why medical separation does not block the charge
When a member enters the disability evaluation process through a Medical Evaluation Board and, if warranted, a Physical Evaluation Board, the member generally remains in the service and remains subject to military law. Being in a medical-processing posture is not a discharge. Until separation or retirement is final, the member still has duties, still has a place of duty, and can still be absent from it without authorization. For that reason, the mere fact that medical separation proceedings have begun does not immunize a member from an absence offense, including desertion if the intent element is present.
It is worth distinguishing the timing carefully. If a member is still in service and pending medical separation, an unauthorized absence during that period is an absence from current duty and can be charged. If, on the other hand, the member has already been lawfully and finally separated, the analysis changes, because a person who is no longer a member of the armed forces is generally no longer subject to the Code in the same way. The phrase after medical separation proceedings begin points to the in-process period, and during that period the member’s amenability to charge ordinarily continues.
Where the medical situation becomes a powerful defense
Although the medical process does not bar the charge, the member’s medical and mental condition can go directly to the heart of whether desertion can be proven. Because desertion turns on specific intent, evidence that the member lacked the capacity to form an intent to remain away permanently can negate the offense. A mental health condition that prevented the member from forming that intent, such as a severe psychiatric episode or incapacitating impairment, may defeat the desertion theory entirely, even if the absence itself is undisputed. In many cases a member who is genuinely unwell did not leave to abandon the service forever but rather acted out of confusion, fear, pain, or a disordered mental state.
Where a medical or mental health condition does not fully negate intent, it can still serve as significant mitigation. Even if a factfinder concludes that some intent existed, evidence of the member’s illness, injury, treatment, and the stress of the disability process can substantially reduce culpability and influence sentencing. A member who was awaiting evaluation, in pain, or struggling with a documented condition presents a very different picture than a healthy member who deliberately fled with no intention of returning.
The likely real charge
In practice, a member who goes absent while pending medical separation is often more appropriately viewed through the lens of absence without leave under Article 86 than desertion under Article 85, precisely because the intent to remain away permanently is hard to prove when the member was in the middle of a process aimed at addressing their medical condition. The medical posture undercuts the inference of permanent intent that desertion requires. Whether the government pursues desertion or the lesser absence offense depends on the specific facts, including how the member left, what they said and did during the absence, and whether they returned or were apprehended.
What a service member should do
A member who is pending medical separation and finds themselves accused of an absence offense should treat the situation seriously and seek counsel promptly. The medical record is not just background; it is potentially central to the defense, because it speaks to capacity, intent, and mitigation. Preserving medical documentation, identifying treating providers who can speak to the member’s condition, and articulating the reasons for the absence are all important. An experienced military defense attorney can press the government on the intent element, argue for the lesser offense where appropriate, and marshal the medical evidence both to contest guilt and to mitigate any sentence.
The bottom line is that beginning medical separation proceedings does not prevent a desertion charge, because the member remains subject to military law until separation is final. But the same medical circumstances that fail to bar the charge often make desertion difficult to prove, since the offense requires a specific intent that illness, injury, or mental health conditions may negate or at least mitigate. Anyone in this position should consult a military defense attorney to evaluate both the intent question and the full weight of the medical evidence.
Disclaimer
This article is provided strictly for general educational and informational purposes. It is intended to explain how the Uniform Code of Military Justice (UCMJ), the Rules for Courts-Martial, the Military Rules of Evidence, and related military administrative processes work as a matter of public legal education. It does not constitute legal advice, a legal opinion, or a recommendation about any particular case, and it is not a substitute for advice from a qualified military defense attorney who can evaluate the specific facts and command, service, and jurisdictional circumstances involved.
Reading this article, or contacting any website on which it appears, does not create an attorney-client relationship between the reader and any law firm, attorney, or author. Every court-martial, nonjudicial punishment action, administrative separation, and security-clearance matter turns on its own facts, the charged articles, the convening authority, the service branch, and the evidence, and outcomes vary widely from one case to another.
Military law also changes over time. The Military Justice Act of 2016 (effective January 1, 2019) and subsequent National Defense Authorization Acts renumbered and rewrote many punitive articles, revised the Article 32 preliminary hearing, and altered sentencing, clemency, and appellate procedures. Statutes, regulations, executive orders, the Manual for Courts-Martial, and decisions of the service Courts of Criminal Appeals and the Court of Appeals for the Armed Forces may have been amended, superseded, or reinterpreted after this article was written, and article numbers or procedures cited here may have changed.
For these reasons, no reader should act or decline to act based on this content without first consulting a licensed attorney experienced in military justice about their own situation. The author and publisher make no warranty, express or implied, as to the accuracy, completeness, timeliness, or current applicability of the information provided, and disclaim any liability for any action taken or not taken in reliance on it. If you are facing investigation, charges, or an adverse administrative action, time limits may apply, and you should seek qualified counsel promptly.