Battle of Yashima
1185 CE.
Shown on the map at 34.346°, 134.122°.
Battle of Yashima (屋島の戦い) was one of the battles of the Genpei War on March 22, 1185, in the Heian period. It occurred in Sanuki Province (Shikoku), which is now Takamatsu, Kagawa.
Text from the Wikipedia article Battle of Yashima, licensed CC BY-SA 4.0.