Court-Martial Trial Procedure: Motions, Pleas, Panel Selection, Findings, and Sentencing
Key takeaways
- Most defenses are decided at the motions stage — and most motions must be raised before pleas are entered or they are forfeited. R.C.M. 905.
- The forum election — judge alone or members, with or without enlisted members — is one of the biggest strategic calls in the case.
- A guilty plea is not a formality: the providence inquiry can and does reject pleas, and an improvident plea can undo an entire agreement.
- Conviction requires concurrence of at least three-fourths of the panel members; there are no hung juries in military practice.
- Sentencing is a separate trial with its own evidence, argument, and credits — preparation for it starts on day one.
The trial phase at a glance
Motions (39(a) sessions)→
Forum election & pleas→
Voir dire & challenges→
Trial on the merits→
Findings→
Sentencing
Everything before this phase — investigation, the Article 32, referral — is covered in the pretrial section; everything after the sentence is in post-trial and appeals. This section owns the courtroom.
Stage by stage
Motions
Between arraignment and trial, the case is shaped at Article 39(a) sessions: suppression of statements and searches, dismissal for speedy trial or defective charges, discovery enforcement, and relief for pretrial errors. The waiver rules are unforgiving — issues not raised on time are lost.
Pleas
A guilty plea triggers the military’s uniquely searching providence inquiry: the judge personally questions the accused until satisfied the plea is knowing, voluntary, and factually supported. Plea agreements themselves are negotiated pretrial — see R.C.M. 705 — but they live or die in this courtroom colloquy.
The panel
In a members trial, voir dire and challenges determine who judges the facts: challenges for cause under the liberal-grant mandate, implied bias, one peremptory per side, and the enlisted-members election.
Findings
The judge instructs from the Benchbook; the members deliberate in secret and vote by written ballot, with three-fourths required to convict. Instructions fights — elements, defenses, lesser included offenses — are appellate issues made or lost in real time.
Sentencing
Conviction opens a second trial: presentencing procedure with government aggravation, victim statements, defense extenuation and mitigation, the unsworn statement, and the credits — Allen, Mason, Pierce — that reduce what is adjudged.
What this means if your trial date is set
Work backward from the deadlines: motions before pleas, challenges at voir dire, instruction objections before deliberations, credits claimed on the record. Every stage of this phase has a door that locks. A defense team that knows the deadlines — and files early — keeps every issue alive for trial and for appeal.
Guides in this section
Frequently asked questions
How long does a court-martial trial take?
The courtroom phase of most contested courts-martial runs from a few days to two weeks, but the motions litigation before it can span months. Complex cases — multiple charges, expert-heavy evidence, classified material — run longer at both stages.
Should I choose a military judge or a panel?
It depends on the case: judge-alone trials suit technical, law-driven defenses; panels suit credibility contests and sympathetic facts. The election also affects sentencing exposure. This is one of the most consequential strategic decisions in the case and should be made with counsel who has tried cases both ways.
What percentage of the panel must vote guilty?
At least three-fourths of the members must concur to convict in non-capital cases, with votes by secret written ballot. Fewer than three-fourths produces an acquittal on that specification — the military has no hung juries.
Can I still fight the sentence after being found guilty?
Yes. Sentencing is a separate adversarial proceeding where the defense presents extenuation, mitigation, character evidence, and an unsworn statement, argues for specific relief, and claims confinement credits. Many cases are 'won' at sentencing even after findings go against the accused.
About the attorneys behind this guide
Michael Waddington, Civilian Military Defense Lawyer
Michael Waddington has tried courts-martial for more than 25 years on both sides of the aisle — as an Army prosecutor and defense counsel, then as a civilian defense lawyer in Article 120, war crimes, and violent-offense trials around the world. A published author on cross-examination whose techniques are taught to trial advocates, he built this section from the courtroom outward: motions, voir dire, findings, and sentencing as they actually unfold.
Alexandra González-Waddington, Founding Partner
Alexandra González-Waddington, founding partner of Gonzalez & Waddington, brings 20-plus years of trial and sentencing advocacy to this section — from providence inquiries protected against improvidence to sentencing cases built witness by witness. She has defended service members at trial in sexual assault, domestic violence, and homicide cases across every branch, and she reviewed these guides against current procedure.
Talk to a civilian court-martial defense lawyer today
Gonzalez & Waddington defends Soldiers, Sailors, Airmen, Marines, Guardians, and Coast Guardsmen worldwide — in UCMJ investigations, courts-martial, Article 15/NJP actions, GOMOR rebuttals, administrative separation boards, and Boards of Inquiry. We defend the whole case: the investigation, the trial, the administrative fallout, and the long-term consequences to your rank, retirement, clearance, and discharge.
Sources for this guide include the Uniform Code of Military Justice, the Manual for Courts-Martial (2024 ed.), the Rules for Courts-Martial, the TJAGLCS Criminal Law Deskbook, and the cited decisions of the Court of Appeals for the Armed Forces and the service Courts of Criminal Appeals. It is attorney advertising and general legal information — not legal advice, and reading it does not create an attorney–client relationship. Every case turns on its own facts. Service procedures vary; Army references (AR 27-10) are noted where used.