Still a matter of speculation because of conflicting accounts from surviving Japanese veterans .
It has been said that Kuribayashi led this final assault , which unlike the loud banzai charge of previous battles , was characterized as a silent attack .
Although still a matter of speculation because of conflicting accounts from surviving Japanese veterans , it has been said that Kuribayashi led this final assault , which unlike the loud banzai charge of previous battles , was characterized as a silent attack .