Battle of Hatchōoki
1868 CE.
Shown on the map at 37.473°, 138.890°.
The Battle of Hatchōoki (八丁沖の戦い, Hatchōoki no tatakai) was an ambush in the middle of the Battle of Hokuetsu in the Boshin War by forces of Nagaoka Domain on forces loyal to the Imperial Court. The battle occurred in what is now the city of Nagaoka, in Niigata Prefecture.
Text from the Wikipedia article Battle of Hatchōoki, licensed CC BY-SA 4.0.