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 ready?. Turn over. Hue City interviews, roll . Well, like-- Like you see, you know, it's a major city... ...so we have to assault with tanks, we roll in the streets. So they send us in first to squat... ...make sure that there are no little.... No Vietnamese waiting with B- rockets (..)1987 Full Metal Jacket