Court-Martial Trial Practice Blog
Takepart notes:
Of course, Robinson didn’t begin his fight for equal rights overnight. While enlisted, Robinson was court-martialed for refusing to sit at the back of the bus — eleven years before Rosa Parks. Faced with multiple offenses, including public drunkenness (even though Robinson did not drink), the UCLA standout was acquitted of all charges by an all-white jury.
American Heritage Magazine has this introduction to the charges (and a fairly decent history of the case):