What Are the Three Types of Courts-Martial and How Do They Differ in Scope and Authority?

When a service member faces military prosecution, the single fact that most shapes what is at stake is not the charge itself but the forum chosen to try it. The Uniform Code of Military Justice authorizes three courts-martial, and they are not three sizes of the same proceeding. They differ in who decides guilt, how much punishment can follow, whether a conviction carries any federal weight, and whether the accused can refuse the proceeding outright. Understanding those differences is what separates a minor disciplinary record from a life-altering federal conviction.

The Three Tiers at a Glance

The summary, special, and general courts-martial form a deliberate ladder. Each rung adds formality, procedural protection, and punishment authority, and each is convened by a different level of command.

Feature	Summary court-martial	Special court-martial	General court-martial
Statutory jurisdiction	Art. 20 (10 U.S.C. 820)	Art. 19 (10 U.S.C. 819)	Art. 18 (10 U.S.C. 818)
Who decides	One commissioned officer	Military judge + 4 members, or judge alone	Military judge + 8 members (12 if capital), or judge alone
Convening authority	SCM convening authority (Art. 24)	SPCM convening authority (Art. 23)	GCM convening authority (Art. 22)
Maximum punishment	Limited (no discharge, short confinement)	Up to 12 months confinement + bad-conduct discharge; judge-alone capped at 6 months, no BCD	Full lawful range up to death where authorized
Article 32 hearing required	No	No	Yes, before referral
Federal criminal conviction	No (non-criminal forum)	Yes	Yes
Accused may refuse the forum	Yes	No	No

The rest of this guide unpacks why each of those columns matters in practice.

Who Sits in Judgment

The deciding body changes completely from one tier to the next, and that change drives nearly everything else.

A summary court-martial is presided over by a single commissioned officer who has no military judge above them. That officer simultaneously functions as judge, fact-finder, and the authority who questions witnesses, which is why the proceeding resembles a structured hearing more than a trial. It has jurisdiction only over enlisted members; officers, cadets, aviation cadets, and midshipmen cannot be tried by summary court-martial (Art. 20, 10 U.S.C. 820).

A special court-martial introduces a detailed military judge and, in the standard configuration, a panel of four members (Art. 16, 10 U.S.C. 816). The accused may instead request trial by military judge alone. This is the first tier where the proceeding looks and runs like a recognizable criminal trial, with formal rules of evidence and represented parties.

A general court-martial seats a military judge with a panel of eight members. In a capital case the panel grows to twelve members, a fixed number set by Article 25a (10 U.S.C. 825a). The accused may elect a judge-alone trial except where the death penalty is in play. These fixed panel sizes reflect the Military Justice Act of 2016, effective 1 January 2019; older descriptions referencing a “minimum of five” or “minimum of three” members describe a system that no longer exists.

How Conviction Is Decided

In both the special and general courts-martial that use members, a finding of guilty requires the concurrence of at least three-fourths of the members voting (Art. 52, 10 U.S.C. 852). On an eight-member general court-martial that means six members; on a four-member special court-martial it means three. There is no hung jury on findings in the military system the way there is in civilian court.

Capital cases are the exception that proves how seriously the system treats death. A death sentence requires a unanimous finding of guilt on a death-eligible offense and a separate unanimous determination by the members that the sentence include death (Art. 52). A single member can take execution off the table. The summary court-martial, by contrast, has a single officer who alone determines the outcome under the beyond-a-reasonable-doubt standard that governs findings of guilty at every tier.

How Much Punishment Each Can Impose

Punishment ceiling is the clearest dividing line and the reason forum choice carries such weight.

A summary court-martial cannot adjudge a punitive discharge and is confined to short, lower-level sanctions calibrated to minor misconduct. A special court-martial may adjudge confinement for up to twelve months and a bad-conduct discharge, but Article 19 (10 U.S.C. 819) carves out a sharper limit when the case is referred to a special court-martial consisting of a military judge alone: no bad-conduct discharge, and no more than six months of confinement or forfeiture of pay. The maximum exposure in a judge-alone special court-martial is therefore roughly half that of a member-panel special court-martial.

A general court-martial may adjudge any lawful punishment not forbidden by the code, “including the penalty of death when specifically authorized” (Art. 18, 10 U.S.C. 818). It is the only forum that can reach the most severe sentences, and certain offenses, including sexual assault under Articles 120 and 120b, may be tried only by general court-martial.

The Article 32 Gate Before a General Court-Martial

A general court-martial is the only tier guarded by a mandatory preliminary hearing. Under Article 32 (10 U.S.C. 832), a preliminary hearing must be held before charges are referred to a general court-martial. The hearing officer examines whether the specification states an offense, whether probable cause exists to believe the accused committed it, whether the court would have jurisdiction, and what disposition to recommend. Since the FY2014 reforms, this is a focused probable-cause and disposition screening, not the broad investigative discovery tool the old Article 32 investigation once was. Beyond that hearing, the convening authority must receive written advice from the staff judge advocate before referral (Art. 34, 10 U.S.C. 834). Neither the summary nor the special court-martial carries this gate, which is one reason a general court-martial takes longer to reach trial.

Convening Authority: Command Levels Mirror the Tiers

Each court-martial is convened by a correspondingly senior level of command. Summary courts-martial are convened under Article 24 (10 U.S.C. 824), special courts-martial under Article 23 (10 U.S.C. 823), and general courts-martial under Article 22 (10 U.S.C. 822), which lists senior commanders and high-level officials. The authority nests downward: a commander empowered to convene a general court-martial may also convene special and summary courts-martial, and a special court-martial convening authority may also convene summary courts-martial.

That said, the convening authority no longer controls the forum decision for the most serious cases. Under the Office of Special Trial Counsel established by Article 24a (10 U.S.C. 824a), effective 27 December 2023, independent special trial counsel hold exclusive, binding authority over a list of “covered offenses,” including sexual assault, murder, and domestic violence committed on or after that date. Sexual harassment was added as a covered offense effective 1 January 2025. For those offenses the charging and forum decision belongs to the special trial counsel rather than the commander, while non-covered offenses remain within the traditional command disposition framework.

The Status That Distinguishes a Summary Court-Martial

The most consequential difference is one the punishment columns do not capture. A summary court-martial is, by statute, a non-criminal forum, and a finding of guilty there does not constitute a criminal conviction (Art. 20, 10 U.S.C. 820). A special or general court-martial conviction, by contrast, is a federal criminal conviction with the collateral consequences that label carries.

This is also why the summary court-martial is the only forum the accused can decline. No person may be brought to trial by summary court-martial over their objection (Art. 20). If the accused refuses, the command may dispose of the matter through other means or refer the charges to a higher court-martial, where the protections increase but so does the exposure. The right to refuse is therefore a genuine decision: accepting keeps the matter out of the criminal-conviction column, while refusing trades a low ceiling for the larger machinery and larger risk of a special or general court-martial.

Appellate Review Tracks the Forum

The forum also fixes the appellate path. A general court-martial whose judgment includes death, a dismissal, a dishonorable or bad-conduct discharge, or confinement for two years or more receives automatic review by the service Court of Criminal Appeals (Art. 66, 10 U.S.C. 866), as can a special court-martial that adjudges a bad-conduct discharge. From there a case may travel to the Court of Appeals for the Armed Forces and, ultimately, to the Supreme Court on discretionary review. A summary court-martial, consistent with its non-criminal status, does not generate automatic Court of Criminal Appeals review, though other administrative review channels remain available.

A Worked Comparison

Consider one set of facts moving up the ladder. An enlisted member alleged to have committed a property offense, routed to a summary court-martial, is heard in one sitting by one officer; the sanction is modest, no discharge can result, the outcome is not a criminal conviction, and the member could have refused the forum to begin with. If the command concludes the conduct warrants a punitive discharge, a special court-martial becomes the vehicle, with a military judge, a four-member panel or judge alone deciding by three-fourths vote, a bad-conduct discharge and up to a year of confinement in range, and a federal conviction as the result. Should the allegations expand to an offense carrying years of confinement or a life sentence, only a general court-martial fits, which adds the Article 32 hearing, staff judge advocate advice, an eight-member panel, and the system’s full punitive reach. The facts did not change. The forum did, and with it nearly everything that matters to the accused.

Sources

10 U.S.C. 816 (Art. 16), Courts-martial classified: https://www.law.cornell.edu/uscode/text/10/816
10 U.S.C. 818 (Art. 18), Jurisdiction of general courts-martial: https://www.law.cornell.edu/uscode/text/10/818
10 U.S.C. 819 (Art. 19), Jurisdiction of special courts-martial: https://www.law.cornell.edu/uscode/text/10/819
10 U.S.C. 820 (Art. 20), Jurisdiction of summary courts-martial: https://www.law.cornell.edu/uscode/text/10/820
10 U.S.C. 822-824 (Arts. 22-24), Who may convene courts-martial: https://www.law.cornell.edu/uscode/text/10/822
10 U.S.C. 825a (Art. 25a), Number of members in capital cases: https://www.law.cornell.edu/uscode/text/10/825a
10 U.S.C. 832 (Art. 32), Preliminary hearing: https://www.law.cornell.edu/uscode/text/10/832
10 U.S.C. 834 (Art. 34), Advice to convening authority before referral: https://www.law.cornell.edu/uscode/text/10/834
10 U.S.C. 852 (Art. 52), Votes required for conviction and sentencing: https://www.law.cornell.edu/uscode/text/10/852
10 U.S.C. 866 (Art. 66), Courts of Criminal Appeals: https://www.law.cornell.edu/uscode/text/10/866
10 U.S.C. 824a (Art. 24a), Office of Special Trial Counsel: https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title10-section824a

Disclaimer

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.