Solorio v. United States: Court-Martial Jurisdiction Follows the Uniform, Not the Crime
Key takeaways
- Solorio overruled O’Callahan v. Parker and its “service-connection” test after 18 years.
- The rule since 1987: subject matter jurisdiction turns on military status at the time of the offense — nothing more.
- The UCMJ’s punitive articles apply in all places, so off-base, off-duty, and overseas conduct is all reachable. Arts. 5, 18, UCMJ.
- The government still bears the burden of establishing jurisdiction by a preponderance of the evidence — and status questions remain litigable, especially for reservists and retirees.
The case in one sentence
Solorio v. United States, 483 U.S. 435 (1987), holds that the jurisdiction of a court-martial depends solely on the accused’s status as a member of the armed forces — overruling the “service-connection” test that had required the offense itself to have a military nexus.
The facts
For nearly two decades before Solorio, the governing rule came from O’Callahan v. Parker, 395 U.S. 258 (1969): a court-martial could try a service member only for offenses that were “service-connected.” The Supreme Court elaborated the idea in Relford v. Commandant, 401 U.S. 355 (1971), which set out a list of factors for measuring whether a crime was connected enough to military service to be tried by the military. The result was a generation of litigation over where an offense happened, who the victim was, and whether military interests were implicated — with off-base civilian-style crimes often beyond the court-martial’s reach.
Solorio arrived as a direct challenge to that framework: a service member prosecuted at court-martial for offenses committed against civilians, in circumstances that put the service-connection question squarely before the Court.
The holding
The Court overruled O’Callahan and discarded the service-connection test entirely. Jurisdiction of a court-martial depends solely on the accused’s status as a member of the armed forces — a rule CAAF has restated ever since, including in United States v. Hennis, 79 M.J. 370, 379 (C.A.A.F. 2020). The statutory anchors are blunt: Article 18 gives general courts-martial jurisdiction to try persons subject to the UCMJ for any offense made punishable by the code, and under Article 5 the code applies in all places. The location of the accused at the time of the offense is irrelevant.
| Before Solorio (1969–1987) | After Solorio (1987–today) | |
|---|---|---|
| Governing case | O’Callahan v. Parker, refined by the Relford factors | Solorio v. United States |
| Test | Offense must be “service-connected” | Accused must hold military status at the time of the offense |
| Off-base civilian-style crime | Often outside court-martial jurisdiction | Fully within court-martial jurisdiction |
| Main jurisdictional battleground | The nature and location of the offense | The status of the accused |
In Hennis, CAAF also closed a lingering question, rejecting the suggestion that a service-connection requirement survives in capital cases and holding that Solorio applies to capital cases.
Why it matters in courts-martial today
Solorio is why the military can prosecute a purely off-duty, off-base offense against civilians — a DUI in town, an assault at a private residence, conduct overseas — so long as the accused wore the uniform when it happened. It moved the entire jurisdictional fight from the offense to the person. The modern questions in court-martial jurisdiction are status questions: was the accused on active duty, or a reservist in a qualifying duty status, when the offense occurred? Does jurisdiction reach a retiree or a Guard member in state status? Was there an enlistment defect or effective discharge that severed status?
Two guardrails remain. The government bears the burden of establishing jurisdiction by a preponderance of the evidence, United States v. Oliver, 57 M.J. 170 (C.A.A.F. 2002), and jurisdiction over the offense is only one of three prerequisites — a court-martial also needs personal jurisdiction over the accused and a properly convened and composed court. United States v. Ali, 71 M.J. 256 (C.A.A.F. 2012). Status-based does not mean unlitigable; it means the litigation happens on different ground.
Solorio also means military and civilian jurisdiction now routinely overlap: the same off-base offense may be triable by a state and by a court-martial, and which sovereign proceeds is a matter of policy, not a limit on subject matter jurisdiction. In the Army, regulation adds a comity-based policy that a Soldier generally will not be court-martialed or punished under Article 15 for the same act a civilian court has already tried — a protection worth knowing, though it is policy rather than a jurisdictional bar, and service practice varies.
What this means if you are charged for off-duty conduct
Do not expect “it happened off base” or “it had nothing to do with my job” to defeat the charge — since Solorio, that argument is gone. But jurisdiction is not automatic. Your duty status on the date of the offense, the validity of your enlistment, and whether you had been discharged are all facts the government must prove, and each has generated dismissals in the right cases. If your path into military status is at all unusual — reserve duty, retirement, a contested discharge date — have counsel scrutinize it before anything else.
Where this case shows up in our guides
- Court-martial jurisdiction — the status-based framework Solorio created, and the three prerequisites for a valid court-martial.
- Jurisdiction over reservists, Guard members, and retirees — where the status question is most contested today.
- Challenging jurisdiction — enlistment defects, discharge, and the motions that still win.
- What Is the UCMJ? — the worldwide reach of the code that Solorio made fully effective.
Practitioner’s note
In every case with an unusual duty posture, we build a status timeline before touching the merits: enlistment or commissioning date, orders, activation periods, the claimed date of each offense, and any discharge paperwork. Solorio means the government rarely worries about jurisdiction — which is precisely why the defense should. When the offense date sits near a gap in status — between drill periods, after an ETS date, around a discharge that was processed but contested — the jurisdictional motion is often the strongest one in the case.
Frequently asked questions
What did Solorio v. United States change?
It abolished the service-connection test from O'Callahan v. Parker, which had required an offense to have a military nexus before a court-martial could try it. Since Solorio, subject matter jurisdiction depends solely on whether the accused was a member of the armed forces when the offense was committed — the nature and location of the crime no longer matter.
Can the military court-martial me for something that happened off base?
Yes. Under Solorio and Articles 5 and 18 of the UCMJ, the code applies in all places, and a court-martial may try any UCMJ offense committed by someone with military status — off base, off duty, or overseas. Which sovereign actually prosecutes when civilian authorities also have jurisdiction is a policy choice, not a jurisdictional limit.
Is court-martial jurisdiction ever still worth challenging?
Often. The government must prove jurisdiction by a preponderance of the evidence, and status itself can be contested — duty status of reservists and Guard members, jurisdiction over retirees, enlistment defects, and whether a discharge terminated status before the offense or the trial. Jurisdictional defects can end a prosecution entirely.
Does the service-connection test still apply in death penalty cases?
No. A concurring opinion in Loving v. United States had raised the possibility that capital prosecutions might still require the government to show a service connection between the offense and the military. CAAF rejected that suggestion in United States v. Hennis, holding squarely that Solorio's status-based rule applies to capital cases just as it does to every other court-martial.
About the attorneys behind this guide
Michael Waddington, Civilian Military Defense Lawyer
Michael Waddington has litigated court-martial jurisdiction for more than 25 years — the status timelines, activation orders, and discharge-date fights that Solorio made decisive. As a former Army prosecutor and defense counsel and a civilian military defense lawyer with cases worldwide, he has defended service members prosecuted for wholly off-base and overseas conduct, where Solorio supplies the government’s jurisdiction and status analysis supplies the defense’s counterattack.
Alexandra González-Waddington, Founding Partner
Alexandra González-Waddington, founding partner of Gonzalez & Waddington, has spent more than 20 years defending UCMJ cases arising far from any military installation — off-duty allegations, overseas conduct, and prosecutions of members whose duty status was anything but simple. She has pressed jurisdictional challenges alongside the merits and legally reviewed this profile against Solorio and current CAAF status case law.
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.