Cases under Article 120 of the Uniform Code of Military Justice often involve alcohol, and a difficult version arises when both people had been drinking. An accused may argue that because both parties were intoxicated, neither could be held responsible, or that mutual drinking made the encounter consensual. Article 120 does not work that way. The statute and the case law interpreting it draw careful distinctions that do not turn on whether both people drank. They turn on whether one person was incapable of consenting, on what the accused reasonably believed, and on whether the accused’s own intoxication can excuse an unreasonable belief. Walking through these distinctions shows why “we were both drunk” is not, by itself, a defense.
Intoxication is not the same as incapacity
The first distinction is between being intoxicated and being incapable of consenting. Article 120 defines consent as a freely given agreement by a competent person and addresses the situation in which a person is incapable of consenting due to impairment by a drug, intoxicant, or other similar substance. The term incapable of consenting means the person could not appraise the nature of the conduct or was physically unable to decline or to communicate unwillingness.
The key point is that ordinary intoxication does not automatically establish incapacity. A person can be drinking, even substantially affected, and still be legally capable of consenting. The government must prove impairment serious enough to negate the capacity to consent, not merely that the person had consumed alcohol. This is why the fact that both parties were drinking does not resolve anything on its own. The question is whether the alleged victim crossed the line from intoxicated to incapable, which is a factual question about that person’s condition.
The accused’s drinking does not create symmetry
A common intuition is that if both parties were equally intoxicated, the situation is symmetrical and neither should bear responsibility. The law rejects that symmetry. Incapacitation is analyzed by reference to the condition of the person alleged to have been incapable, not by comparing the two people’s blood alcohol levels. If one person was incapable of consenting, the offense can be established regardless of how intoxicated the other person was. Courts have made clear that a complaining witness’s voluntary intoxication does not supply a defense to the accused, and that incapacitation is incapacitation regardless of how it came about. Mutual drinking, therefore, does not neutralize the analysis; it simply means the fact-finder must examine each person’s actual condition.
Mistake of fact as to consent, and the limit on intoxication
Where intoxication does become relevant to the accused is through the affirmative defense of mistake of fact as to consent. Article 120 recognizes consent and mistake of fact as to consent as affirmative defenses. A mistake of fact defense requires that the accused’s belief in consent was both honestly held and objectively reasonable. The belief must satisfy a subjective component and an objective component; an honest but unreasonable belief is not enough.
This is where the accused’s own drinking cuts against the defense rather than for it. Voluntary intoxication of the accused cannot be used to make an unreasonable belief seem reasonable. The reasonableness of the belief is measured against what a sober person would have perceived under the circumstances. So an accused who says, in effect, “I was too drunk to realize she could not consent” is not aided by that argument. The law will not allow voluntary intoxication to lower the standard for reasonableness. If the surrounding facts would have signaled incapacity or lack of consent to a sober observer, the accused’s intoxicated failure to perceive it does not establish the defense.
How charging choices shape a mutual-intoxication case
The way charges are framed also matters. Article 120 separately addresses sexual acts committed upon a person who did not consent and sexual acts committed upon a person who was incapable of consenting due to impairment. Appellate decisions have examined the boundary between these theories, including cases distinguishing proof that a person did not consent from proof that a person was incapable of consenting. The two theories rest on different factual showings, and the government’s choice of theory determines what it must prove. In a case involving heavy mutual drinking, the dispute often centers on whether the evidence supports the specific theory charged, which is why the precise statutory language, rather than a general sense that everyone was drunk, controls the outcome.
What this means in practice
In a mutual-intoxication scenario, Article 120 directs attention to concrete questions rather than to a comparison of how much each person drank. Was the alleged victim merely intoxicated, or impaired to the point of being incapable of consenting under the statutory definition? Did the accused hold a belief in consent that was both honest and reasonable to a sober person? Could the accused’s own voluntary intoxication be used to excuse an unreasonable belief? The answers are no shortcut to acquittal: mutual drinking neither establishes incapacity nor erases responsibility, and the accused’s intoxication cannot rescue an unreasonable belief. These are intensely fact-bound questions, and because liberty and a service member’s career are at stake, anyone facing such an allegation should obtain qualified military defense counsel to evaluate the specific evidence and charging theory.
Disclaimer
This article is provided strictly for general educational and informational purposes. It is intended to explain how the Uniform Code of Military Justice (UCMJ), the Rules for Courts-Martial, the Military Rules of Evidence, and related military administrative processes work as a matter of public legal education. It does not constitute legal advice, a legal opinion, or a recommendation about any particular case, and it is not a substitute for advice from a qualified military defense attorney who can evaluate the specific facts and command, service, and jurisdictional circumstances involved.
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Military law also changes over time. The Military Justice Act of 2016 (effective January 1, 2019) and subsequent National Defense Authorization Acts renumbered and rewrote many punitive articles, revised the Article 32 preliminary hearing, and altered sentencing, clemency, and appellate procedures. Statutes, regulations, executive orders, the Manual for Courts-Martial, and decisions of the service Courts of Criminal Appeals and the Court of Appeals for the Armed Forces may have been amended, superseded, or reinterpreted after this article was written, and article numbers or procedures cited here may have changed.
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