The academy says commanders recommended the charges because the investigations but were completed about the same time.
The cadets -- Stephan H. Claxton, Kyle A. Cressy and Robert M. Evenson Jr. -- are not incarcerated. Their hometowns were not released.
Claxton and Cressy are attending classes and Evenson is on casual status, a category usually used for cadets awaiting another assignment.
A Defense Department report last month said 33 sexual assaults were reported at the academy in the 2010-2011 academic year, up from 20 the previous year, though five of the 33 happened prior to military service.