Answer:
One of his accomplishments as Chief Justice of the Supreme Court was that he upheld the principle of judicial review.
Step-by-step explanation:
John Marshall served as the fourth Chief Justice of the United States from 1801 to 1835.
In 1803 the court received the Marbury v. Madison case. In that case, the Marshall opinion advocate that courts could strike down federal and state laws if they conflicted with the Constitution.
I hope this answer helps you.