Battle of Natural Bridge
1865 CE.
Shown on the map at 30.284°, -84.152°.
The Battle of Natural Bridge was fought during the American Civil War near what is now Woodville, Florida south of Tallahassee on March 6, 1865. A small group of Confederate troops and volunteers, which included teenagers from the nearby Florida Military and Collegiate Institute that would later become Florida State University, protected by breastworks, prevented a detachment of United States Colored Troops from crossing the Natural Bridge on the St. Marks River. The Natural Bridge is a 1⁄4-mile-long (400-meter) stretch along which the St. Marks River runs underground, after dropping into a sinkhole.
Text from the Wikipedia article Battle of Natural Bridge, licensed CC BY-SA 4.0.