The "separate but equal" doctrine is most often held to violate the Fourteenth Amendment, but many have argued it also violates the Thirteenth Amendment by "applying the badge of slavery" to those targeted by segregation laws.
The Fourteenth Amendment, specifically the Equal Protection Clause
14th Amendment
14th
Segregation violated the Equal Protection Clause in the Fourteenth Amendment.
It was the 14th amendment that was violated. The 14th amendment guarantees equal protection of the laws for every US citizen. Since racial minorities were being segregated, it was not an equal protection of the law
In the court case Plessy v. Ferguson (1896), the primary amendment that was argued to be violated was the Fourteenth Amendment, specifically its Equal Protection Clause. Homer Plessy, who was of mixed race, challenged Louisiana's segregation laws by refusing to leave a "whites-only" railroad car. The Supreme Court ruled that racial segregation was constitutional as long as the separate facilities were "equal," thus upholding the doctrine of "separate but equal" and effectively allowing for racial discrimination.
Plessy's Thirteenth and Fourteenth Amendment rights were violated.(ALS)
The court decided that the segregation of students in schools violated the "equal protection clause" of the fourteenth amendment, because separate facilities were obviously unequal.
The Supreme Court prohibited racial gerrymandering in 1993, holding that the practice violated the 14th Amendment's Equal Protection Clause.
The Supreme Court decision that found separate but equal schools to be unconstitutional and fundamentally unequal was Brown v. Board of Education (1954). This landmark ruling declared that racial segregation in public schools violated the Equal Protection Clause of the Fourteenth Amendment. It overturned the "separate but equal" doctrine established in Plessy v. Ferguson (1896).
The fourteenth amendment gave him the right to equal treatment on a train. APEX :)
In the case of Plessy v. Ferguson, Plessy's legal team argued that Louisiana's Separate Car Act, which required racial segregation on trains, violated the Thirteenth and Fourteenth Amendments of the U.S. Constitution. They contended that the law denied Plessy equal protection under the law, as guaranteed by the Fourteenth Amendment. However, the Supreme Court rejected this argument and upheld the constitutionality of "separate but equal" racial segregation.