UCMJ Article 114 Dueling vs Article 128 Assault: Formal Combat by Agreement vs Unlawful Violence
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An agreed fistfight behind the barracks is not a duel under the UCMJ. The Manual for Courts-Martial defines a duel as “combat between two persons for private reasons fought with deadly weapons by prior agreement” (MCM, Part IV, ¶ 52.c(2)(a)). Without deadly weapons, a prearranged fight is analyzed as assault under Article 128 or as a breach of the peace, not as dueling under Article 114.
Article 114(b) also reaches people who never fight: those who promote a duel, connive at one, or fail to report a known challenge.
Article 114(b)
(1) who fights or promotes, or is concerned in or connives at fighting, a duel; or
(2) who, having knowledge of a challenge sent or about to be sent, fails to report the facts promptly to the proper authority;
Source: 10 U.S.C. § 914(b) (Article 114), dueling.
The Manual breaks the subsection into four offenses (¶ 52.b(2)-(5), c(2)):
- Dueling. The accused fought another person with deadly weapons, for private reasons, by prior agreement. All three elements are required.
- Promoting a duel. Urging or taunting someone to challenge or accept, acting as a second, carrying a challenge or an acceptance, or otherwise contributing to the fight.
- Conniving at a duel. Knowing that steps are being taken toward arranging or fighting a duel and failing “to take reasonable preventive action.”
- Failing to report a challenge. Knowing that a challenge has been sent or is about to be sent and not reporting it promptly to proper authority.
Sending or accepting a challenge is not listed as a separate offense in the statute. The person who carries it may be promoting a duel; the person who knows of it may have a duty to report it.
Article 128
Article 128(a) makes it an assault to attempt, offer, or do bodily harm to another person “unlawfully and with force or violence” (10 U.S.C. § 928(a)). An assault must be done “without legal justification or excuse and without the lawful consent of the person affected” (MCM, Part IV, ¶ 77.c(2)(a)). Aggravated assault includes an offer of bodily harm with a dangerous weapon and intent to do bodily harm, which requires no injury (¶ 77.c(5)(a)).
The Manual also treats a mutual fight as a public order matter: engaging in an affray is one of its examples of conduct that may constitute a breach of the peace under Article 116 (¶ 54.c(2)).
How the facts sort
| Duel (Article 114(b)) | Assault (Article 128) | |
|---|---|---|
| Agreement | Required: prior agreement | Not required |
| Weapons | Deadly weapons required | Any force; a dangerous weapon raises the offense to aggravated assault |
| Reason | Private reasons | Not an element |
| Liability of others | Promoting, conniving, and failing to report are offenses | Others may be liable as principals under Article 77 |
| Injury | Not required | Not required for attempt, offer, or aggravated assault with a dangerous weapon; required for battery |
For example, two service members who agree over a personal insult to meet off base with knives, and do so, fit the dueling elements, and a third who carries the challenge and acts as a second promotes the duel. Had the same two agreed to settle the insult with their fists in a parking lot, there would be no deadly weapons, so Article 114(b) would not fit, and the fight would be analyzed as assault or battery under Article 128, or as a breach of the peace. Whether the other fighter’s agreement amounts to the “lawful consent” ¶ 77.c(2)(a) refers to is a question for counsel. Whether a particular object or manner of fighting was deadly turns on the evidence of what was used and how.
Maximum punishments
| Offense | Maximum |
|---|---|
| Any Article 114 offense, including dueling, promoting, conniving, and failing to report | Dishonorable discharge, forfeiture of all pay and allowances, 1 year (MCM, Part IV, ¶ 52.d) |
| Simple assault | Confinement for 3 months and forfeiture of two-thirds pay per month for 3 months (¶ 77.d(1)(a)) |
| Assault consummated by a battery | Bad-conduct discharge, forfeiture of all pay and allowances, 6 months (¶ 77.d(2)(a)) |
| Aggravated assault with a dangerous weapon | Dishonorable discharge and total forfeitures; 3 years, 5 years on a child under 16, or 8 years with a loaded firearm (¶ 77.d(4)(a)) |
| Aggravated assault inflicting grievous bodily harm | Dishonorable discharge and total forfeitures; 5 years, 8 years on a child under 16, or 10 years with a loaded firearm (¶ 77.d(4)(c)) |
A duel fought with deadly weapons carries a lower Article 114 ceiling than the aggravated assault the same weapons could support, and each article has its own elements. How charges from one incident are combined is a question for counsel. Where every finding of guilty is for an offense committed after December 27, 2023, the military judge determines the sentence in a general or special court-martial, capital cases excepted (10 U.S.C. § 853(b)(1)).
Sources
- 10 U.S.C. § 914, endangerment offenses, including dueling (Article 114)
- 10 U.S.C. § 928, assault (Article 128)
- 10 U.S.C. § 916, riot or breach of peace (Article 116)
- 10 U.S.C. § 853, findings and sentencing (Article 53)
- Manual for Courts-Martial, United States (2024 edition), Part IV, ¶ 52, ¶ 54, and ¶ 77.
This is general legal information on dueling and assault, not an assessment of any fight or agreement. This page reflects the UCMJ as amended through Public Law 119-60 (December 18, 2025) and the Manual for Courts-Martial (2024 edition) as amended by Executive Order 14130.