Battle of Fort Myers
1865 CE.
Shown on the map at 26.632°, -81.857°.
The Battle of Fort Myers was fought on February 20, 1865, in Lee County, Florida during the last months of the American Civil War. This small engagement is known as the "southernmost land battle of the Civil War."
Text from the Wikipedia article Battle of Fort Myers, licensed CC BY-SA 4.0.