UCMJ Article 103a Espionage vs Article 103b Aiding the Enemy: Gathering Intelligence vs Providing Assistance
On this page: 5 sections
Espionage under Article 103a is about national defense information going to any foreign government, faction, or force, with intent or reason to believe it will injure the United States or help a foreign nation; the recipient need not be an enemy. Aiding the enemy under Article 103b is about any help to the enemy, whether arms, supplies, money, shelter, intelligence, training, or simply unauthorized communication. Passing defense secrets to an enemy can fit both; passing them to a friendly foreign government fits only espionage; selling food to an enemy fits only aiding the enemy. Neither statute punishes gathering information by itself: Article 103a lists communicating, delivering, and transmitting, and attempts to do so. Collecting information clandestinely or under false pretenses in time of war is a different offense, spying under Article 103.
Article 103a: espionage
(a)(1) Any person subject to this chapter who, with intent or reason to believe that it is to be used to the injury of the United States or to the advantage of a foreign nation, communicates, delivers, or transmits, or attempts to communicate, deliver, or transmit, to any entity described in paragraph (2), either directly or indirectly, anything described in paragraph (3) shall be punished as a court-martial may direct
Source: 10 U.S.C. § 903a(a)(1) (Article 103a).
The recipients are a foreign government; a faction, party, or military or naval force in a foreign country, recognized or not; or a representative, officer, agent, employee, subject, or citizen of one of them. The protected material is any document, code book, photograph, plan, model, instrument, or “information relating to the national defense” (§ 903a(a)(2)-(3)). The intent element means the accused “acted in bad faith and without lawful authority with respect to information that is not lawfully accessible to the public” (MCM, Part IV, ¶ 32.c(1)).
Subsections (b) and (c) of the statute are not additional offenses. They govern when death may be adjudged: only for espionage that directly concerns listed categories, such as nuclear weaponry, war plans, or cryptographic information, and only if the members unanimously find a statutory aggravating factor and unanimously determine that aggravating circumstances substantially outweigh extenuating and mitigating ones.
Article 103b: aiding the enemy
(1) aids, or attempts to aid, the enemy with arms, ammunition, supplies, money, or other things; or
(2) without proper authority, knowingly harbors or protects or gives intelligence to, provides military education, military training, or tactical advice to, or communicates or corresponds with or holds any intercourse with the enemy, either directly or indirectly;
Source: 10 U.S.C. § 903b (Article 103b), as amended by Pub. L. 118-159, § 564 (December 23, 2024).
Clause (2) requires knowledge, and “without proper authority” qualifies clause (2) only. Intelligence given to the enemy must be true or imply the truth at least in part, and communicating with the enemy is complete “the moment the communication … issues from the accused,” whatever its content or intent (MCM, Part IV, ¶ 33.c(5)-(6)). The article reaches “all persons whether or not otherwise subject to military law” (¶ 33.c(1)). The statute states no time-of-war element; the offense depends on the existence of an “enemy,” which includes any hostile body U.S. forces may be opposing (¶ 27.c(1)(b)).
How the facts sort
| Espionage (Article 103a) | Aiding the enemy (Article 103b) | |
|---|---|---|
| Recipient | Any foreign government, faction, force, or their agents or citizens | The enemy |
| What is passed | National defense information | Arms, supplies, money, or other things; shelter; intelligence; training or tactical advice; any communication |
| Mental state | Intent or reason to believe it will injure the United States or advantage a foreign nation | Knowingly, without proper authority, for clause (2) |
| Who can commit it | Any person subject to the UCMJ | Any person |
| Death penalty | Only for listed categories, with unanimous findings | Available |
For example, a service member who sells a copy of a classified logistics plan to an intelligence officer of a neutral foreign country, for money, raises espionage under Article 103a; the buyer is not an enemy, so Article 103b does not apply. A service member who runs a paid online course teaching small-unit tactics and knowingly enrolls fighters from an armed group U.S. forces are opposing falls under the other article: providing military training or tactical advice to the enemy without proper authority raises Article 103b(2), even though no classified information changed hands. Whether a group was an “enemy” and whether information related to the national defense turn on the facts of the conflict and of the material.
Maximum punishments
| Offense | Maximum (MCM, Part IV, ¶ 32.d and ¶ 33.d) |
|---|---|
| Espionage as a capital offense | Death or such other punishment as a court-martial may direct |
| Espionage or attempted espionage, other cases | Any punishment other than death that a court-martial may direct |
| Aiding the enemy | Death or such other punishment as a court-martial or military commission may direct |
In a capital case, the members decide whether a death-eligible conviction results in death or life without eligibility for parole, or return the matter to the military judge (10 U.S.C. § 853(c)(1)). In a case not tried as capital, 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 (§ 853(b)(1)).
Sources
- 10 U.S.C. § 903a, espionage (Article 103a)
- 10 U.S.C. § 903b, aiding the enemy (Article 103b)
- 10 U.S.C. § 853, findings and sentencing (Article 53)
- Manual for Courts-Martial, United States (2024 edition), Part IV, ¶ 27, ¶ 32, and ¶ 33.
- Pub. L. 118-159, § 564 (December 23, 2024).
Legal information about Articles 103a and 103b; it does not assess any disclosure, clearance, or contact. 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.