The superintendent of the United States Military Academy disclosed Wednesday that he would ban pillow fights like the one on Aug. 20 that left two dozen freshmen cadets with concussions and six with other injuries.

The pillow fights at West Point, N.Y., have long served as a way for new cadets to build camaraderie at the beginning of their grueling plebe year. But the event three months ago appeared to set records for aggression.

The wounds included a fractured cheek and a broken nose. The latter was caused, a new Army investigation said, by the helmet one cadet was wearing “rotating forward and striking him in the nose” after he was struck by a pillow. Another cadet was found unconscious.

In addition, the superintendent, Lt. Gen. Robert L. Caslen Jr., said in a statement that the academy was pursuing unspecified administrative disciplinary measures against those involved in the fights, including “senior military members and cadets alike.” General Caslen did not identify or provide ranks of those who could be punished, but said he intended “to send a clear message that this kind of behavior will not be tolerated.”