Siege of Oshi
1590 CE.
Shown on the map at 36.137°, 139.453°.
The 1590 siege of Oshi (忍城の戦い, Oshi-jō no tatakai) was one of many battles in Toyotomi Hideyoshi's campaigns against the Hōjō clan during Japan's Sengoku period.
Text from the Wikipedia article Siege of Oshi, licensed CC BY-SA 4.0.