Final answer:
McCulloch v. Maryland allowed the federal government to establish a national bank and confirmed the principle of national supremacy.
Step-by-step explanation:
McCulloch v. Maryland was a landmark Supreme Court case in 1819 that allowed the federal government to establish a national bank and confirmed the principle of national supremacy. The case involved a dispute between the state of Maryland and the Second Bank of the United States. The Supreme Court, led by Chief Justice John Marshall, ruled that Congress had the implied power to create a national bank under the necessary and proper clause of the Constitution, and that states could not interfere with the legitimate actions of the federal government. This ruling established the doctrine of implied powers and the principle of national supremacy.