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]
(..) standing up to these guys. Count to five, then throw. Hey, no offense, but you got somethin' bigger in that belt? - What now? - All-out assault on Bane. But you need to get people across the bridge. - Why? - In case we fail. Lead an exodus. (..)2012 The Dark Knight Rises