They owned most of the land, but were treated like second class citizens and were denied political rights. ... Lowest social class, they had no rights.
I believe the year in question is not 1970 but 1790.
The answer to the question is South Carolina. Given its small size compared to the other states they had the huge number of slaves about 65%. The 65% were African-American slaves. The slaves population in South Carolina grew in connection to their rice culture success.
Answer:
When the observance was first declared in 1868 by General John Logan, it was called Decoration Day in reference to a tradition of decorating the graves of those whose lives were lost in the Civil War and its set date was May 30.
Explanation: