He was the fourth Chief Justice of the United States

The most well-known aspect of John Marshall is his tenure as US Chief Justice. John Adams originally appointed him to that position in 1801. John Marshall's stint as Chief Justice is one of the most influential in American history, and he is regarded as one of the most significant individuals to hold the position at any time, which is an interesting fact about him. The 34 years leading up to his passing in 1831 were spent as Chief Justice.

On February 2, 1801, the Supreme Court Chamber of the Capitol Building hosted the first meeting of the Marshall Court. The Chief Justice Marshall presided over the court at the time, along with Associate Justices Bushrod Washington, William Cushing, William Paterson, Samuel Chase, and Alfred Moore, all of whom had been chosen by Presidents Washington or Adams. The Supreme Court had hitherto been regarded as a rather unimportant institution. Instead of federal courts, state courts handled the majority of legal disputes. In its early years, the Court had only issued 63 rulings, few of which had had a substantial impact, and it had never overturned a federal or state statute.

The Supreme Court would first become a significant power in the federal government during Marshall's 34-year tenure as Chief Justice, and Marshall himself had a significant impact on how the country understood constitutional law. More than 1000 judgements would be rendered by the Marshall Court, almost half of which were written by Marshall himself. Despite the Democratic-Republicans' political dominance after 1800, Marshall's leadership of the Supreme Court meant that the federal government would exercise relatively substantial powers.