Battle of Saint John's Bluff
1862 CE.
Shown on the map at 30.385°, -81.500°.
The Battle of St. John's Bluff was fought from October 1–3, 1862, between Union and Confederate forces in Duval County, Florida, during the American Civil War. The battle resulted in a significant Union victory, helping secure their control of the Jacksonville area.
Text from the Wikipedia article Battle of St. Johns Bluff, licensed CC BY-SA 4.0.