Article 31 of the Uniform Code of Military Justice (UCMJ), codified at 10 U.S.C. section 831, is the military’s protection against compelled self-incrimination, and it predates and in some respects exceeds the civilian Miranda warning. The heart of the protection is subsection (b), which requires a specific advisement before anyone subject to the Code interrogates or requests a statement from a suspect or an accused. A valid Article 31(b) warning has three indispensable components. If any one is missing, the warning is defective and a resulting statement may be suppressed.
The statutory source
Article 31(b) states that no person subject to the Code may interrogate, or request any statement from, an accused or a person suspected of an offense without first informing that person of three things: the nature of the accusation, the right not to make any statement regarding the offense, and that any statement made may be used as evidence against the person in a trial by court-martial. These three pieces are the warning. The statute then backs them up in subsection (d), which bars the use against the accused of any statement obtained in violation of Article 31.
Point one: the nature of the accusation
Before questioning begins, the suspect must be told the nature of the offense of which he is suspected or accused. This is not a demand for a recitation of statutory elements or a polished legal charge. It requires enough information to orient the suspect to the subject of the interrogation so that the decision whether to speak is an informed one. Telling a service member that he is suspected of, for example, larceny of a specific item, or of an unauthorized absence on certain dates, satisfies the point; vaguely announcing that the member is “in trouble” does not. The purpose is to prevent the suspect from being lulled into talking about a matter he did not realize was the focus of a criminal inquiry.
Point two: the right to remain silent
The suspect must be advised that he does not have to make any statement regarding the offense. This is the right to remain silent in its purest form. It tells the member that silence is a lawful option and that he is under no obligation to answer questions or volunteer information about the suspected offense. This component is the operational core of the protection against compelled self-incrimination, because it makes clear that any decision to speak is voluntary.
Point three: that any statement may be used as evidence
Finally, the suspect must be told that any statement he does make may be used as evidence against him in a trial by court-martial. This consequence warning ensures the member understands that talking is not a private or consequence-free exchange and that his words can later be introduced in a criminal proceeding. Together with the right to remain silent, it allows the suspect to weigh the real cost of speaking before he does so.
Who must give the warning and when
A distinctive feature of Article 31, broader than civilian Miranda doctrine, is that it is not limited to formal custodial interrogation by police. The duty to warn attaches whenever a person subject to the UCMJ questions or requests a statement from someone the questioner suspects of an offense, where the questioning is in an official law-enforcement or disciplinary capacity rather than a purely personal or administrative one. The triggering conditions are essentially that the questioner is acting in an official capacity, that the person questioned is a suspect or accused, and that the questioner is seeking a statement. Because supervisors and noncommissioned officers, not just investigators, can fall within this duty, Article 31 reaches far more interactions than its civilian counterpart.
The consequence of an invalid warning
The enforcement mechanism is suppression. Under Article 31(d), a statement obtained without the required advisement, or through coercion, unlawful influence, or unlawful inducement, may not be received in evidence against the accused at a court-martial. If any of the three points is omitted, or if questioning that required a warning proceeded without one, the defense can move to exclude the statement and any evidence derived from it. This is why the completeness of the warning is litigated so frequently: leaving out even the consequence warning or the nature of the accusation can render an otherwise voluntary confession inadmissible.
A note on the right to counsel
The three Article 31(b) points do not, by themselves, include a right-to-counsel advisement. The right to counsel during custodial interrogation comes from separate constitutional and regulatory sources and is typically combined with the Article 31 rights in the standard advisement forms the services use. So while a complete real-world rights advisement usually adds a counsel warning, the three statutory components that Article 31(b) itself mandates are the nature of the accusation, the right to remain silent, and the warning that statements may be used as evidence.
Bottom line
A valid Article 31(b) warning must include three points: the nature of the accusation, advice that the person need not make any statement regarding the offense, and a warning that any statement made may be used as evidence against him in a trial by court-martial. The duty to give this warning extends well beyond formal police interrogation to any official questioning of a suspect by a person subject to the Code. If any component is missing where the warning was required, the resulting statement is subject to suppression under Article 31(d).
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.