Siege of Shika Castle
1546 CE.
Shown on the map at 35.459°, 134.064°.
The siege of Shika Castle, which took place in September 1547, was one of many battles fought in Takeda Shingen's bid to seize control of Shinano Province.
Text from the Wikipedia article Siege of Shika Castle, licensed CC BY-SA 4.0.