Hernandez v. Texas, 347 U.S. 475 (1954), was a landmark case, "the first and only Mexican-American civil-rights case heard and decided by the United States Supreme Court during the post-World War II period." In a unanimous ruling, the court held that Mexican Americans and all other racial or national groups in the United States had equal protection under the 14th Amendment of the U.S. Constitution. The ruling was written by Justice Earl Warren. This was the first case in which Mexican-American lawyers had appeared before the US Supreme Court.