He was accused of 'assault'. = He was charged with 'assault'. = 'Assault' charges were brought against him.
He came 'under assault' for his unusual beliefs. [=he was severely criticized for his unusual beliefs]
He was found guilty of 'sexual assault'. [=the crime of touching someone in an unwanted sexual way]
(..) - You people. You got yourself something. You know what you got now, Chris? How about breaking and entering? By the looks of this, a little assault as well. Thank you, Thomas. - This can't go any farther. - It won't, Sister. You know, I have some -year-olds... (..)2006 Silent Hill