As the U.S. Civil War came to a close in April 1865, Union troops entered the city of Charleston, S.C., where four years prior the war had begun. While white residents had largely fled the city, Black residents of Charleston remained to celebrate and welcome the troops, who included the Twenty-First Colored Infantry. Their celebration on May 1, 1865, the first “Decoration Day,” later became Memorial Day.
Historian David Blight retold the story:
During the final year of the war, the Confederates had converted the planters’ horse track, the Washington Race Course and Jockey Club, into an outdoor prison. Union soldiers were kept in horrible conditions in the interior of the track; at least 257 died of exposure and disease and were hastily buried in a mass grave behind the grandstand. Some 28 black workmen went to the site, re-buried the Union dead properly, and built a high fence around the cemetery. They whitewashed the fence and built an archway over an entrance on which they inscribed the words, “Martyrs of the Race Course.” via LA Progressive.