Answer:
A unanimous Court overturned Plessy v. Importance: The Brown decision is heralded as a landmark decision in Supreme Court history, overturning Plessy v. Ferguson (1896) which had created the "separate but equal" doctrine.
Explanation:
A landmark case is a court case that is studied because it has historical and legal significance. The most significant cases are those that have had a lasting effect on the application of a certain law, often concerning your individual rights and liberties.