Battle of Athens
1861 CE.
Shown on the map at 40.585°, -91.696°.
The Battle of Athens was an American Civil War skirmish that took place in northeast Missouri in 1861 near present-day Revere and Lee County, Iowa along the Des Moines River across from Croton (3 miles southeast of Farmington). The Union victory has the distinction of being the most northerly of Civil War Battles fought west of the Mississippi, and also of being the only such battle fought along the Iowa border.
Text from the Wikipedia article Battle of Athens (1861), licensed CC BY-SA 4.0.