From the record
“Musgrove Mill State Historic Site was the site of the Battle of Musgrove Mill, an action in the American Revolutionary War, which occurred on August 19, 1780, near the Enoree River, on what is the border between Spartanburg, Laurens, and Union Counties in South Carolina, approximately seven miles from Interstate 26.”
Wikipedia article Musgrove Mill State Historic Site, CC BY-SA 4.0.
One of 33 National Register listings published here for Union County · listed in 1975 · category: Site.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service



