UCMJ Article 134: Bigamy

Bigamy is one of the offenses that remained inside Article 134, the General Article, after the 2019 restructuring of the punitive articles moved many former Article 134 offenses to standalone provisions. It is not separately codified in the United States Code. Instead it is an enumerated offense the President has defined in Part IV of the Manual for Courts-Martial under the authority of 10 U.S.C. 934. At its core the offense is simple to state: a service member who already has a living, lawful spouse and who then goes through a marriage ceremony with another person has committed bigamy, provided the conduct also satisfies the article’s terminal element.

Military prosecution of bigamy tends to surface for reasons that have little to do with the marriage ceremony itself. A concurrent marriage often comes to light through dependent enrollment records, claims for basic allowance for housing, survivor-benefit paperwork, or a background investigation for a security clearance. The collision between the second marriage and the military’s benefits and personnel systems is frequently what brings the matter to a commander’s attention.

The elements the government must prove

Because bigamy is an enumerated Article 134 offense, the Manual sets out the specific elements the prosecution must establish beyond a reasonable doubt. There are three.

First, that at a stated time and place the accused had a lawful living spouse. The first marriage must have been valid and must still have been in existence, undissolved by divorce, annulment, or death.

Second, that while having that lawful spouse the accused wrongfully married another person. This is the act of going through a second marriage ceremony while the first marriage subsisted.

Third, the terminal element common to every Article 134 charge: that under the circumstances the conduct was to the prejudice of good order and discipline in the armed forces, or was of a nature to bring discredit upon the armed forces, or both. This element is not assumed from the act. It must be separately pleaded and proven, and the charge sheet must specify which clause is alleged.

The word “lawful” carries weight in the first element. The validity and continued existence of the first marriage are usually proved with documentary evidence: a marriage certificate, records from the jurisdiction where the first marriage was performed, and the absence of any divorce decree or other dissolution. Where the first marriage was contracted abroad, its validity is generally judged by the law of the place where it was performed, which can require evidence about foreign marital law.

The maximum punishment

The maximum punishment for bigamy set out in the Manual for Courts-Martial is a dishonorable discharge, forfeiture of all pay and allowances, and confinement for two years. As with any court-martial sentence, lawful collateral punishments such as reduction to the lowest enlisted grade may also be adjudged within the overall ceiling.

That ceiling is the maximum, not a mandatory or typical outcome. The sentence actually imposed turns on the circumstances, including whether the second marriage was used to obtain benefits, how long the situation persisted, and the harm to the people involved. For offenses committed on or after 27 December 2023, a military judge sets the sentence within statutory sentencing parameters rather than members fixing it, a change from the older practice. Any specific punishment figure should be confirmed against the edition of the Manual in force at the time of the offense.

Defenses and the role of honest mistake

The defense that arises most often in bigamy cases is honest and reasonable mistake of fact about the status of the first marriage. The Manual recognizes that a belief that the prior marriage had ended, by divorce, by the death of the other spouse, or otherwise, is a defense if the belief was both honest and reasonable. The reasonableness inquiry is what does the work. A vague assumption that divorce paperwork “must have gone through,” with no steps actually taken to dissolve the marriage, is unlikely to meet the standard. Reliance on a divorce the accused had genuine reason to believe was final, or on credible information that a long-absent spouse had died, stands on far stronger ground.

Other defenses go to the elements directly. The defense may contest that the first marriage was ever valid, or may show that it had in fact been dissolved before the second ceremony, which negates the existence of a living lawful spouse. The defense may also contest the terminal element, arguing that on the particular facts the conduct did not prejudice good order and discipline or bring discredit upon the service.

How bigamy relates to other charges and to civilian law

Bigamy rarely travels alone when benefits are involved. If a service member concealed the first marriage in order to enroll a second spouse as a dependent and draw housing allowance or other entitlements, the government may add charges for false official statements under Article 107 or for related fraud offenses, which carry their own penalties and substantially increase the overall exposure. The bigamy charge addresses the marriage; the fraud charges address the deception used to obtain money or benefits.

Bigamy is also a crime in most states. A service member can in principle face both a state prosecution and a court-martial, because the two proceedings represent separate sovereigns, and the military proceeding addresses the offense’s effect on military discipline and the integrity of the benefits system. In practice, military and civilian authorities often coordinate, and one forum may defer to the other.

The administrative consequences run parallel to and independently of any criminal case. Dependent enrollment records may be corrected, an improperly enrolled spouse removed from healthcare coverage, and allowances paid on the basis of the invalid marriage recouped through the finance system. These steps do not require a conviction and can proceed even where no court-martial is convened.

Sources

• 10 U.S.C. 934 (UCMJ Article 134, General Article), via Legal Information Institute, Cornell Law School: https://www.law.cornell.edu/uscode/text/10/934
• 10 U.S.C. 934, via the United States Code, Office of the Law Revision Counsel / uscode.house.gov: https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title10-section934
• Manual for Courts-Martial, United States (2024 edition), Part IV, Article 134 enumerated offenses, via the Joint Service Committee on Military Justice: https://jsc.defense.gov/Military-Law/Current-Publications-and-Updates/

This article is for general informational purposes only and is not legal advice. It describes military law and matters of public record, does not address any individual case, and does not create an attorney-client relationship.