Second Siege of Takatenjin
1581 CE.
Shown on the map at 34.698°, 138.035°.
The second siege of Takatenjin began only six years after Takeda Katsuyori had taken the fortress. Lasting from 1580 until 22 March 1581, the siege ended within four months and resulted in the deaths of 680 of Okabe Motonobu's garrison.
Text from the Wikipedia article Siege of Takatenjin (1581), licensed CC BY-SA 4.0.