Service members sometimes group Article 31 and Article 138 together because both appear in the Uniform Code of Military Justice and both relate to protecting individual rights. In practice they serve very different functions. Article 31 is a self-incrimination protection that operates inside the criminal process, while Article 138 is a grievance mechanism for challenging a wrong committed by a commanding officer. Knowing which one applies to a given problem is the first step toward seeking the right remedy.
Article 31: A Self-Incrimination Protection in the Criminal Process
Article 31, codified at 10 U.S.C. 831, safeguards service members against compelled self-incrimination. Subsection (a) prohibits compelling any person to incriminate themselves. Subsection (b) requires that before interrogating or requesting a statement from a suspect or accused, the questioner inform the person of the nature of the accusation, advise that the person need not make any statement regarding the offense, and warn that any statement may be used as evidence against the person at a court-martial. Subsection (c) bars compelling a person to make a statement or produce evidence that is not material and may tend to degrade them. Subsection (d) provides the remedy by stating that a statement obtained in violation of the article, or through coercion, unlawful influence, or unlawful inducement, may not be received in evidence against the person at a court-martial.
The defining features of Article 31 are its setting and its remedy. It applies during questioning and within the criminal justice process, and it is enforced primarily by excluding improperly obtained statements. When an Article 31 violation occurs, the typical response is a motion to suppress the statement in a court-martial or, where relevant, an administrative proceeding. The protection is about the integrity of evidence gathered against the individual.
Article 138: A Complaint of Wrongs Against a Commanding Officer
Article 138, codified at 10 U.S.C. 938, serves an entirely different purpose. It gives a service member who believes they have been wronged by their commanding officer a formal avenue to seek redress. The provision allows a member who, after due application to the commanding officer, is refused redress to complain to a superior commissioned officer. That officer forwards the complaint to the officer exercising general court-martial jurisdiction over the commander complained against, who must examine the complaint and take proper measures to redress the wrong.
The procedure generally has two stages. First, the member ordinarily submits a written request for redress to the commanding officer alleged to have committed the wrong, and the commander has a defined period to respond. Service regulations commonly set a window such as fifteen days for the commander’s written response. Second, if redress is refused, the member may submit a formal written complaint to a superior commissioned officer, typically within a set period after discovering the wrong, often expressed as ninety days under service regulations. The matter is then forwarded up the chain to the officer with general court-martial jurisdiction for examination and action. Commanders are prohibited from restricting the submission of such complaints or retaliating against a member who files one.
The Core Differences
The most important difference is the kind of problem each addresses. Article 31 addresses self-incrimination during questioning in the criminal process. Article 138 addresses a discretionary or wrongful act by a commanding officer that has aggrieved the member, outside the narrow context of a courtroom statement.
A second difference is the remedy. Article 31 is enforced by excluding improperly obtained statements from evidence at a court-martial. Article 138 is enforced administratively through the chain of command, resulting in examination of the complaint and proper measures to redress the wrong, rather than the suppression of evidence.
A third difference is the forum. An Article 31 issue is litigated within the court-martial or related proceeding, often by motion before a military judge. An Article 138 complaint travels through command channels to a superior officer and ultimately to the officer exercising general court-martial jurisdiction, who is responsible for resolving it.
A fourth difference is timing and process. Article 31 protection is triggered at the moment of questioning and is asserted reactively when the government seeks to use a statement. Article 138 follows a structured, deadline-driven grievance procedure that the member initiates by first seeking redress from the commander and then escalating if redress is refused.
Choosing the Right Tool
Because the two provisions address different harms, they are not interchangeable. If the concern is that a service member was questioned without proper warnings or was compelled to incriminate themselves, the relevant protection is Article 31, and the remedy lies in suppressing the statement. If the concern is that a commanding officer has wronged the member through some act or decision and has refused to fix it, the appropriate tool is an Article 138 complaint of wrongs. In some situations a member may have both a criminal exposure and a separate grievance against a commander, in which case each issue is pursued through its own channel.
In summary, Article 31 and Article 138 differ in nearly every respect that matters. Article 31 is a self-incrimination safeguard enforced by excluding improperly obtained statements within the criminal process. Article 138 is a complaint of wrongs procedure that lets a service member seek administrative redress from the chain of command for a wrong committed by a commanding officer. Identifying which doctrine fits the situation ensures the member pursues the remedy the law actually provides.
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.