UCMJ Article 128 Assault: Tiers, Defenses, and Penalties

A charge under UCMJ Article 128 assault can mean anything from a threatening gesture that never lands to a strangulation attack, and the sentence tracks that range: three months’ confinement at the low end, up to ten years plus a dishonorable discharge at the top. The statute, codified at 10 U.S.C. § 928, sorts the conduct into three tiers — simple assault and battery, aggravated assault, and assault with intent to commit a serious felony — and each tier has its own elements and its own maximum punishment under the Manual for Courts-Martial.¹

The Three Tiers of Article 128

Subsection (a) covers simple assault in three forms: attempting bodily harm, offering bodily harm, or actually inflicting it. The completed version is what military law calls assault consummated by a battery. “Bodily harm” here means any offensive touching, no matter how slight. A shove or a grabbed arm counts. The word doing the work in every form is “unlawfully” — force applied without a legal justification like self-defense.¹

Subsection (b) is aggravated assault. It applies when the accused used a dangerous weapon with intent to cause bodily harm, inflicted substantial or grievous bodily harm during an assault, or committed the assault by strangulation or suffocation.¹

Subsection (c) is the most serious tier. It covers an assault committed with the specific intent to carry out one of a listed group of felonies: murder, voluntary manslaughter, rape, sexual assault, rape of a child, sexual assault of a child, robbery, arson, burglary, or kidnapping. The prosecution does not have to show the accused got anywhere near completing the intended crime. The assault plus the intent is enough.¹

Simple Assault and Battery: Elements and Penalties

Simple assault can be proven two ways. In an attempted battery, the accused tried to physically harm someone with unlawful force but failed. In an offer of violence, the accused’s conduct made the victim reasonably fear immediate bodily harm even if no contact was intended. A punch that misses is simple assault. A punch that connects is battery.¹

For basic simple assault with no weapon, the 2024 Manual for Courts-Martial sets a maximum of three months’ confinement and forfeiture of two-thirds pay per month for three months. No punitive discharge is authorized, so the sentence itself cannot separate the service member from the military.

Assault consummated by a battery goes higher. It authorizes a bad-conduct discharge, forfeiture of all pay and allowances, and confinement. When the battery involves an unloaded firearm or other dangerous weapon but does not rise to aggravated assault, the maximum jumps to a dishonorable or bad-conduct discharge, total forfeiture, and up to two years’ confinement. If the firearm was loaded, confinement can run to four years.²

Aggravated Assault: Elements and Penalties

Assault With a Dangerous Weapon

Article 128(b)(1) applies when the accused offered bodily harm using a dangerous weapon and intended to cause that harm. A dangerous weapon is not limited to guns and knives. Any object used in a way likely to cause death or serious injury qualifies — a bottle, a vehicle, a piece of furniture. The intent element matters: the prosecution must prove the accused meant to cause bodily harm, not simply that a weapon was in reach.

Maximum confinement starts at three years, with a dishonorable discharge and total forfeiture authorized. It rises to eight years when the weapon was a loaded firearm or when the victim was under 16.²

Assault Inflicting Substantial or Grievous Bodily Harm

Article 128(b)(2) recognizes two distinct injury levels. Substantial bodily harm is a temporary but significant disfigurement or a temporary but significant loss of function in a body part, organ, or mental faculty. A broken nose that heals or a concussion that resolves fits here. Grievous bodily harm is more severe: substantial risk of death, extreme physical pain, protracted and obvious disfigurement, or a protracted loss of bodily function. Permanent scarring, a shattered limb, or organ damage that takes months to heal.

Grievous bodily harm intentionally inflicted carries up to ten years’ confinement along with a dishonorable discharge and total forfeiture. Substantial bodily harm has a lower ceiling but still authorizes a dishonorable discharge.²

Assault by Strangulation or Suffocation

Article 128(b)(3) reaches strangulation and suffocation specifically. The provision recognizes that these attacks can cause brain damage or death in minutes and often leave no visible injury. A charge here does not require proof that the victim suffered any lasting harm. The act itself, done during an assault, is enough. Punishment is at the aggravated assault level, with a dishonorable discharge and confinement authorized.¹

Assault With Intent to Commit a Specified Offense

Sentences under subsection (c) are the harshest in the Article 128 framework because the intended crimes include murder, rape, and kidnapping. Every form authorizes a dishonorable discharge, total forfeiture, and lengthy confinement, with the specific ceiling tied to which underlying offense the accused intended.

Reduction in Grade

On top of confinement and forfeiture, a court-martial can reduce an enlisted service member to the lowest pay grade as part of the sentence for any Article 128 conviction. Officers and warrant officers cannot be reduced in grade by a court-martial.²

When Assault Is Handled at Article 15 Instead

Not every Article 128 case goes to court-martial. Under Article 15 of the UCMJ, a commander can impose non-judicial punishment for minor offenses without formal charges. A shoving match with a bloody lip might be resolved this way. The commander weighs the injury, the accused’s record, and whether the conduct was isolated or a pattern.³

Article 15 sanctions are far lighter than court-martial sentences. For enlisted members, a field-grade commander (major or above) can impose up to 30 days of correctional custody, forfeiture of half a month’s pay for two months, reduction in grade, up to 45 days of extra duties, and up to 60 days of restriction. For officers, the maximum is forfeiture of half a month’s pay for two months and 60 days of restriction.³

Except for personnel attached to or embarked on a vessel, any service member can refuse Article 15 and demand a trial by court-martial. That is a serious gamble because court-martial penalties run much higher, but it delivers the full procedural protections of a trial, including the right to present evidence and cross-examine witnesses.³

Defenses That Can Defeat or Reduce an Article 128 Charge

Once a defense is raised by the evidence, the government has to disprove it beyond a reasonable doubt. The defense does not carry the burden of proof.

Self-Defense and Defense of Others

Self-defense is the most common defense to assault charges. Military appellate courts require two things: the accused reasonably believed bodily harm was about to be wrongfully inflicted, and the accused believed the force used was necessary for protection. The force has to be proportional. You cannot answer a shove with a knife.

Self-defense is lost if you were the initial aggressor, with two exceptions. You regain the right if the other person escalates beyond the level of force you started with, or if you withdraw from the confrontation in good faith and are attacked again. Defense of another person works the same way: reasonable force to protect someone you reasonably believe faces imminent unlawful harm.

Accident and Mistake of Fact

For battery charges, a reasonable and honest mistake about whether the other person consented to the contact can defeat the unlawful-force element. For offer-type assaults, an accident defense is weaker because the question is whether the accused’s conduct created reasonable fear in the victim, not whether an injury was accidental.

Consequences That Outlast the Sentence

Federal Firearms Ban

Under 18 U.S.C. § 922(g)(9), the Lautenberg Amendment, anyone convicted of a misdemeanor crime of domestic violence is permanently banned from possessing firearms or ammunition. There is no military or law enforcement exception. A service member convicted of even a misdemeanor assault against a spouse or intimate partner can no longer carry a weapon on duty or off. For most military occupational specialties, that ends the career.⁶

A dishonorable discharge triggers its own firearms ban under 18 U.S.C. § 922(g)(6), which bars anyone discharged from the armed forces under dishonorable conditions from possessing firearms.⁶

VA Benefits

A dishonorable discharge essentially bars access to Department of Veterans Affairs benefits, including healthcare, disability compensation, and the GI Bill, except in rare cases involving a finding of insanity at the time of the offense. A bad-conduct discharge from a special court-martial receives individual review, and some former members with those discharges do get benefits after a character-of-discharge determination. A 2024 VA rule created a “compelling circumstances” exception for some former members discharged for willful misconduct, weighing factors like length of service and combat-related hardship.⁷

Background Checks

Court-martial convictions are reported to federal databases including the FBI’s National Crime Information Center in qualifying cases, particularly when the sentence includes confinement or when fingerprint records are submitted. For federal employment, security clearance applications, and contractor positions that require fingerprint-based FBI checks, a court-martial conviction is almost certain to surface. Standard commercial checks used by private employers may not always capture lower-level special court-martial results without confinement, but anyone applying for a cleared position should expect the conviction to be found.

1
Office of the Law Revision Counsel. 10 USC 928 – Art. 128. Assault
2
Defense.gov. Manual for Courts-Martial United States 2024 Edition – Supplemental Material
3
Office of the Law Revision Counsel. 10 USC 815 – Art. 15. Commanding Officers Non-Judicial Punishment
4
Defense.gov. Manual for Courts-Martial Part IV – Punitive Articles
5
Office of the Law Revision Counsel. 10 USC 928b – Art. 128b. Domestic Violence
6
Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts
7
VA News. VA Expands Access to Care and Benefits for Some Former Service Members Who Did Not Receive an Honorable or General Discharge