UCMJ Article 128: Assault

A shove in a barracks hallway, a fist raised during a heated argument, a weapon pointed at another service member, a chokehold that cuts off a person’s breath: each of these can fall under a single provision of military criminal law. Article 128 of the Uniform Code of Military Justice (UCMJ), codified at 10 U.S.C. 928, defines assault for the armed forces. It reaches a broad range of conduct, from a threatened blow that never lands to a serious injury inflicted with a dangerous weapon, and it sorts that conduct into tiers carrying very different consequences.

Military law treats violence within the ranks as a direct threat to good order and discipline, so Article 128 covers not only completed acts of harm but also attempts and threatening offers that place another person in apparent danger. Understanding how the statute is structured, what prosecutors must prove, and how it differs from neighboring offenses clarifies why two physically similar incidents can be charged very differently.

How the statute is organized

The current version of Article 128 separates the offense into distinct categories. Subsection (a) addresses assault in its basic forms: it applies to any person subject to the Code who, unlawfully and with force or violence, attempts to do bodily harm, offers to do bodily harm, or actually does bodily harm to another person. The third form, actually inflicting harm, is commonly called assault consummated by a battery.

Subsection (b) defines aggravated assault. This more serious tier applies when a person, with intent to do bodily harm, offers to do that harm with a dangerous weapon; commits an assault that inflicts substantial or grievous bodily harm; or commits an assault by strangulation or suffocation. Subsection (c) addresses assault committed with intent to commit certain other offenses, such as murder, voluntary manslaughter, rape, sexual assault, robbery, arson, burglary, or kidnapping.

Maiming is no longer part of Article 128. The intentional infliction of serious disfigurement or the disabling of a body part is a separate offense under Article 128a (10 U.S.C. 928a), and domestic violence is charged separately under Article 128b. Article 128 itself concerns assault and battery in their general forms.

Numbered elements

The elements vary by the form charged. The core building blocks are as follows.

Simple assault (attempt or offer type):

  1. The accused attempted or offered to do bodily harm to a certain person.
  2. The attempt or offer was done with unlawful force or violence.

Assault consummated by a battery:

  1. The accused did bodily harm to a certain person.
  2. The bodily harm was done with unlawful force or violence.

Aggravated assault with a dangerous weapon:

  1. The accused, with intent to do bodily harm, offered to do bodily harm to a certain person.
  2. The accused did so with a dangerous weapon.
  3. The offer was made with unlawful force or violence.

Aggravated assault inflicting substantial or grievous bodily harm:

  1. The accused assaulted a certain person.
  2. The accused thereby inflicted substantial bodily harm or grievous bodily harm on that person.
  3. The act was done with unlawful force or violence.

Aggravated assault by strangulation or suffocation:

  1. The accused assaulted a certain person.
  2. The accused did so by strangulation or suffocation.

What the government must prove

In every form of the offense, the prosecution carries the burden of proving each element beyond a reasonable doubt. Several recurring points shape how these cases are tried.

The force or violence must be unlawful. Conduct that is otherwise authorized, such as force used in lawful self-defense, in the defense of another, or in sanctioned combatives and contact sports, is not criminal under this article, and the prosecution must establish that the act was not legally justified or excused.

For the attempt and offer forms, no actual contact is required. A demonstration of violence accompanied by an apparent present ability to carry it out can complete the offense even if the blow never connects. The battery and bodily-harm forms, by contrast, require that contact or injury actually occurred.

The aggravating facts must also be proven. Whether a weapon qualifies as a dangerous weapon, whether an injury rises to substantial or grievous bodily harm, and whether an act constitutes strangulation or suffocation are factual questions that determine the tier of the offense and the maximum exposure.

Maximum punishment

Article 128 sets no fixed sentences in the statute itself. It provides that an offender shall be punished as a court-martial may direct, and the specific ceilings are set by the President in the Manual for Courts-Martial (MCM). Under the current MCM, the maximum punishments rise sharply with the seriousness of the offense:

  • Simple assault: confinement for 3 months and forfeiture of two-thirds pay per month for 3 months. No punitive discharge is authorized for the basic form.
  • Assault consummated by a battery: a bad-conduct discharge, total forfeiture of pay and allowances, and confinement for 6 months.
  • Aggravated assault with a dangerous weapon: a dishonorable discharge, total forfeiture, and confinement for 3 years, with a higher ceiling when a loaded firearm is used.
  • Aggravated assault inflicting grievous bodily harm: a dishonorable discharge, total forfeiture, and confinement that can reach up to 10 years in the most serious circumstances, such as the use of a loaded firearm.

Enhanced ceilings can apply when the victim is a child under 16 or when a firearm is involved, and the exact maximum for substantial bodily harm and for strangulation or suffocation is fixed by the current MCM punishment table for the specific charge. Because the figures depend on the precise variation pleaded, the controlling maximums are those stated in the version of the Manual in force at the time of the offense.

A separate procedural development affects sentencing generally rather than the assault maximums: for offenses committed on or after 27 December 2023, federal law shifted to military-judge-alone sentencing in many courts-martial. That change governs how a sentence is determined, not the ceilings listed above.

Defenses

Several defenses recur in assault cases, depending on the facts.

Self-defense and defense of another are central. If a person reasonably believed that force was necessary to protect against an imminent threat of unlawful harm, and the response was proportional, the force is not unlawful. Excessive or retaliatory force can defeat the defense.

Consent can apply in narrow settings, such as authorized combatives training or organized contact sports, where participants accept the ordinary risks of the activity. It does not license conduct that exceeds the rules of the activity or causes harm beyond what was agreed.

Accident applies when the contact resulted from a lawful act performed with due care and without unlawful intent or culpable negligence.

Lack of present or apparent ability can be raised against the attempt and offer forms, where a threatening gesture could not, in context, have placed the victim in genuine apprehension of immediate harm.

Mistake of fact, the absence of the intent required for an aggravated form, and challenges to whether an injury meets the substantial or grievous threshold are also commonly litigated.

Distinctions from neighboring articles

Article 128 sits among several offenses that involve violence or its threat, and the line between them often turns on a single fact.

  • Article 128a (Maiming) covers the intentional infliction of serious disfigurement or the disabling of a body member or organ. What separates it from aggravated assault is the specific intent to injure, disfigure, or disable and the serious nature of the result.
  • Article 128b (Domestic Violence) applies when assaultive conduct is directed at an intimate partner or family member, carrying its own elements and consequences.
  • Articles 118 (Murder) and 119 (Manslaughter) apply where the conduct causes death. Assault with intent to commit murder under Article 128(c) addresses the attempt short of a completed killing.
  • Article 115 (Communicating threats) targets a wrongful communication of intent to harm. Unlike assault, it requires no attempt, no offer accompanied by present ability, and no contact.
  • Article 134 (General article) can reach disorderly or threatening conduct that is prejudicial to good order and discipline or service-discrediting but does not fit the specific elements of assault.

Frequently asked questions

What is the difference between simple assault and assault consummated by a battery?
Simple assault is an unlawful attempt or offer to do bodily harm and can be complete without any physical contact, including an offer made with an apparent present ability to carry it out even though no blow lands. Assault consummated by a battery requires that bodily harm actually occurred through unlawful force or violence. The dividing line is whether contact and harm took place.

Is maiming charged under Article 128?
No. Maiming is a distinct offense under Article 128a. The intentional infliction of serious disfigurement or the disabling of a body part is prosecuted under that separate provision rather than as aggravated assault.

How does aggravated assault differ from the basic offense?
Aggravated assault involves an additional fact that raises the seriousness of the conduct: an offer of harm with a dangerous weapon, the infliction of substantial or grievous bodily harm, or an assault by strangulation or suffocation. These variations carry substantially higher maximum punishments than simple assault or battery.

Do lawful military activities count as assault?
No. Sanctioned training, authorized uses of force, and lawful self-defense are not unlawful. The prosecution must prove that the force or violence was unlawful, which excludes conduct that the law authorizes or excuses, including consensual contact within the rules of authorized combatives or organized sports.

Sources

10 U.S.C. 928, Article 128, Assault: https://www.law.cornell.edu/uscode/text/10/928
10 U.S.C. 928a, Article 128a, Maiming: https://www.law.cornell.edu/uscode/text/10/928a
Manual for Courts-Martial, United States (2024 edition), Part IV: https://jsc.defense.gov/Portals/99/2024%20MCM%20files/MCM%20(2024%20ed)%20(20240102)%20(adjusted%20bookmarks).pdf
U.S. Court of Appeals for the Armed Forces, core criminal law subjects, Article 128: https://www.armfor.uscourts.gov/digest/IIIA54.htm
Military Attorney Joseph L. Jordan, Articles of the UCMJ

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

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