Siege of Koriyama
1540 CE.
Shown on the map at 34.648°, 132.703°.
The siege of Yoshida-Kōriyama Castle (吉田郡山城の戦い, Yoshida-Kōriyama-jō no tatakai) took place from 5 October 1540 (6th day of 9th month of Tenbun 9) until 8 February 1541 (13th day of 1st month of Tenbun 10) in Yoshida, Aki Province, Japan during the Sengoku period. Amago Haruhisa, with 30,000 men, attacked Yoshida-Kōriyama Castle, which belonged to Mōri Motonari and was defended by 8,000 men. When the Ōuchi clan sent an army under the command of Sue Harukata to relieve the siege, the Amago were forced to leave.
Text from the Wikipedia article Siege of Yoshida-Kōriyama Castle, licensed CC BY-SA 4.0.