§ Article 77 : Principals

Article 77 of the UCMJ (10 U.S.C. § 877) does not define a standalone crime. It defines who can be prosecuted as a principal for any offense punishable under the UCMJ — anyone who commits the offense directly, or who aids, abets, counsels, commands, or procures its commission.

Who It Applies To

Article 77 does not create a separate offense. It defines who is a principal — and therefore equally guilty — when an offense punishable under the UCMJ is committed: a person who commits the offense; a person who aids, abets, counsels, commands, or procures its commission; and a person who causes an act to be done that would be punishable under the UCMJ if that person had performed it directly.

What It Covers

Article 77 recognizes three routes to liability as a principal:

1. Perpetrator. The person commits the offense personally, or causes it to be committed by knowingly or intentionally setting in motion the acts of another person or thing — including another person who is unaware of the offense and is therefore not guilty of it.
2. Other party. The person assists, encourages, advises, instigates, counsels, commands, or procures another to commit the offense, and shares in the criminal purpose or design.
3. Causing an act to be done. The person causes an act to be done that would be an offense under the UCMJ if the person had done it directly.

Limits on liability as a principal

• Mere presence at the scene of an offense does not make a person a principal, and presence is not required.
• A person who, without knowledge of the criminal venture, unwittingly assists or encourages it is not guilty of the offense.
• Failing to act makes a person a party only where the person had a duty to interfere and the non-interference was intended to, and did, aid the perpetrator.
• Where an offense requires a specific intent or state of mind, it must be proved for each principal individually, so principals to the same act can be guilty of different offenses.
• A principal can also be liable for other offenses that were a natural and probable consequence of the criminal venture.
• A person who effectively withdraws is not liable for offenses committed afterward. The withdrawal must occur before the offense, must countermand or negate the person’s earlier assistance or encouragement, and must be clearly communicated to the other participants or to law enforcement in time to prevent the offense.
• A person can be a principal even if the perpetrator is not identified, not prosecuted, or acquitted.

Maximum Punishment

Maximum authorized punishment. Article 77 has no punishment of its own. A principal may be punished to the same extent as a person who commits the offense directly, so the maximum is the one authorized for the offense committed.

Sentencing parameters. Article 77 is classified as “dependent on underlying offense”: the Offense Category, or sentencing-criteria treatment, is that of the offense committed.

The newer sentencing rules apply, subject to the capital-case rules, when the accused is convicted only of offenses committed after 27 December 2023. See How UCMJ Sentencing Rules Apply. The maximum authorized punishment and the applicable sentencing framework do not predict the sentence in a particular case.

Related and Distinguished

Article 77 covers participation before or during an offense. Article 78 (accessory after the fact) covers assistance given after an offense is complete, with knowledge of it, to hinder the offender’s apprehension, trial, or punishment.

Liability as a principal also differs from conspiracy (Article 81): a principal is liable for an offense that is actually committed, while conspiracy is complete once there is an agreement and an overt act, whether or not the object offense is ever committed.

What the Provision Does

Article 77 does not create a separate offense. It makes a person who aids, abets, counsels, commands, or procures an offense punishable as a principal, on the same basis as the person who commits it directly.

Sources

• 10 U.S.C. § 877 (Article 77, UCMJ)
• Manual for Courts-Martial, United States, 2024 edition, Part IV, ¶ 1
• Manual for Courts-Martial, United States (2024 ed.), Appendix 12B and Appendix 12C