This question carries a common misconception that needs to be corrected before it can be answered accurately. Under the current Uniform Code of Military Justice, Article 90 no longer covers assault on a superior commissioned officer. As part of the reorganization of the punitive articles that took effect on January 1, 2019, the assault portion of the old Article 90 was moved to Article 89. Article 90 today addresses only the willful disobedience of a lawful command from a superior commissioned officer. So the precise answer depends on which version of the law applies to the conduct in question.
What Article 90 Covered Before 2019
For decades, Article 90 carried two distinct offenses against a superior commissioned officer: striking or assaulting the officer, and willfully disobeying that officer’s lawful command. Under that prior structure, the maximum punishment for striking or assaulting a superior commissioned officer who was in the execution of office, when the offense occurred in time of peace, was a dishonorable discharge, forfeiture of all pay and allowances, and confinement for ten years. In time of war, the statute authorized death as a maximum for the assault branch. The willful disobedience branch in time of peace carried a maximum of dishonorable discharge, forfeiture of all pay and allowances, reduction to the lowest enlisted grade, and confinement for five years, with death authorized in time of war.
So if a charged assault on a superior commissioned officer arose from conduct before January 1, 2019, the older Article 90 framework applies, and the ten-year peacetime maximum for the assault branch is the relevant figure.
What Changed in 2019
The 2019 amendments separated the two offenses. The assault on a superior commissioned officer was relocated to Article 89, which had previously addressed only disrespect. Article 90 was left to govern willful disobedience of a superior commissioned officer’s lawful command. This was a structural reorganization rather than a wholesale change in the seriousness of the conduct. The relevant point for anyone researching a current case is that a charge for striking or assaulting a superior officer today is brought under Article 89, not Article 90.
The Current Maximum for Assault on a Superior Officer Under Article 89
Because the assault offense now lives in Article 89, that is where the maximum punishment is found. For assault on a superior commissioned officer who is in the execution of office, committed in time of …