Plessy v. Ferguson
The decision involved a case that originated in 1892 when Homer Plessy, an "octoroon" (person of seven-eighths white and one-eighth black ancestry) resident of New Orleans, deliberately violated Louisiana's Separate Car Act of 1890, which required "equal, but separate" train car accommodations for white and non-white passengers. Upon being charged, Plessy's lawyers defended him by arguing that the law was unconstitutional. He lost at trial, and his conviction was affirmed on his appeal to the Louisiana Supreme Court. Plessy then appealed to the U.S. Supreme Court, which agreed to hear his case.
Plessy v. Ferguson-2