Siege of Odani Castle
1573 CE.
Shown on the map at 35.459°, 136.277°.
The 1573 siege of Odani Castle (小谷城の戦い, Odani-jō no Tatakai) was the last stand of the Azai clan, one of Oda Nobunaga's chief opponents. and the first battle of Oda Nobutada.
Text from the Wikipedia article Siege of Odani Castle, licensed CC BY-SA 4.0.