The landmark 1803 case
Marbury then sued to obtain it. With his decision in
Early in Marshall's term as Chief Justice, a seemingly insignificant case came
before the Supreme Court. However, that case,
First decision by the Supreme Court to declare a law unconstitutional (1803).
A case in which the Court established a precedent for judicial review in the United States, declaring that acts of Congress that conflict with the Constitution are ...
5 U.S. 137.